Quectel UC15 Hardware Design

Brand: Quectel

Model: UC15

Type: Hardware Design

This manual is also suitable for

UC15 Hardware Design

UMTS/HSDPA Module Series

Rev. UC15_Hardware_Design_V1.0

Date: 2013-10-10

www.quectel.com

UMTS/HSDPA Module

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Our aim is to provide customers with timely and comprehensive service. For any

assistance, please contact our company headquarter:

Quectel Wireless Solutions Co., Ltd.

Room 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233

Tel: +86 21 5108 6236

Mail: [email protected]

Or our local office, for more information, please visit:

http://www.quectel.com/suppo

rt/salesupport.aspx

For technical support, to report documentation errors, please visit:

http://www.quectel.com/support/techsupport.aspx

GENERAL NOTES

QUECTEL OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION

PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT

TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT

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OR DESIGN.

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About the document

History

Revision Date Author Description

1.0 2013-10-10 Felix YIN Initial

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Contents

About the document ................................................................................................................................ 2

Contents .................................................................................................................................................... 3

Table Index ............................................................................................................................................... 5

Figure Inde

x .............................................................................................................................................. 6

1 Introduction ....................................................................................................................................... 7

1.1. Safety

Information ................................................................................................................... 8

2 Product Concept ............................................................................................................................... 9

2.1. General Description ................................................................................................................ 9

2.2. Key

Features ......................................................................................................................... 10

2.3. Functional Diagram ............................................................................................................... 12

2.4. Ev

aluation Board ................................................................................................................... 13

3 Application Interface ....................................................................................................................... 14

3.1. General Description .............................................................................................................. 14

3.2. Pin Ass

ignment ..................................................................................................................... 15

3.3. Pin Descripti

on ...................................................................................................................... 16

3.4. Operating Modes .................................................................................................................. 20

3.5. Power Sav

ing ........................................................................................................................ 22

3.5.1. Sleep Mode.................................................................................................................. 22

3.5.2. W

ake up from Sleep Mode .......................................................................................... 22

3.5.3. Minimum Functionality

Mode ....................................................................................... 22

3.6. Power Suppl

y ........................................................................................................................ 23

3.6.1. Power Suppl

y Pins ....................................................................................................... 23

3.6.2. Decrease V

oltage Drop ................................................................................................ 23

3.6.3. Reference design for power supply ............................................................................. 24

3.6.4. Monitor the Power Suppl

y ............................................................................................ 25

3.6.5. VDD_EXT .................................................................................................................... 25

3.7. T

urn on and off Scenarios ..................................................................................................... 25

3.7.1. T

urn on Module Using the PWRKEY ........................................................................... 25

3.7.2. T

urn off Module ............................................................................................................ 27

3.7.2.1. T

urn off Module Using the PWRKEY Pin .......................................................... 27

3.7.2.2. T

urn off Module Using AT Command ................................................................ 28

3.7.2.3. Automatic S

hutdown ......................................................................................... 28

3.8. Reset the Module .................................................................................................................. 29

3.9. UAR

T Interface ..................................................................................................................... 30

3.9.1. The connection of UAR

T .............................................................................................. 31

3.9.2. UAR

T Application ......................................................................................................... 33

3.10. AUDIO Interface .................................................................................................................... 35

3.10.1. Decrease TDD

noise and other noise .......................................................................... 36

3.10.2. Microphone i

nterfaces configuration ............................................................................ 36

3.10.3. Receiver and speaker interface configuration .............................................................. 37

3.10.4. Earphone interface configuration ................................................................................. 39

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3.11. USIM Card Interface ............................................................................................................. 41

3.11.1. USIM Card

Application ................................................................................................. 41

3.11.2. Design Cons

iderations for USIM Card Holder ............................................................. 43

3.12. USB Interface ........................................................................................................................ 45

3.12.1. Firmware up

grade ........................................................................................................ 46

3.13. ADC Function ........................................................................................................................ 46

3.14. Network S

tatus Indication ...................................................................................................... 47

3.15. Operating S

tatus Indication ................................................................................................... 48

4 Antenna Interface ............................................................................................................................ 50

4.1. Antenna Interface .................................................................................................................. 50

4.1.1. Pin Definition ................................................................................................................ 50

4.1.2. Operating Frequency ................................................................................................... 50

4.1.3. Reference Design ........................................................................................................ 51

4.2. Antenna Inst

allation ............................................................................................................... 51

4.2.1. Antenna Requirement

.................................................................................................. 51

5 Electrical, Reliability

and Radio Characteristics .......................................................................... 52

5.1. Absolute Max

imum Ratings .................................................................................................. 52

5.2. Power Suppl

y Ratings ........................................................................................................... 53

5.3. Operating T

emperature ......................................................................................................... 53

5.4. Current Consumption ............................................................................................................ 54

5.5. RF output power ................................................................................................................... 57

5.6. RF receiv

ing sensitivity ......................................................................................................... 58

5.7. Electros

tatic Discharge ......................................................................................................... 58

6 Mechanical Dimensions.................................................................................................................. 59

6.1. Mechanical Dimensions of the Module.................................................................................. 59

6.2. Footprint of Recommendation ............................................................................................... 62

6.3. T

op View of the Module ......................................................................................................... 63

6.4. Bottom V

iew of the Module ................................................................................................... 63

7 Storage and Manufacturing

............................................................................................................ 64

7.1. Storage.................................................................................................................................. 64

7.2. Manufacturing and W

elding .................................................................................................. 65

8 Appendix A Reference .................................................................................................................... 66

9 Appendix B GPRS Codi

ng Scheme ............................................................................................... 70

10 Appendix C GPRS Multi-

slot Class ................................................................................................ 71

11 Appendix D EDGE Modu

lation and Coding Scheme .................................................................... 72

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Table Index

TABLE 1: UC15 SERIES FREQUENCY BANDS ................................................................................................ 9

TABLE 2: UC15 KEY FEATURES ..................................................................................................................... 10

TABLE 3: IO PARAMETERS DEFINITION ........................................................................................................ 16

TABLE 4: PIN DESCRIPTION ........................................................................................................................... 16

TABLE 5: OVERVIEW OF OPERATING MODES ............................................................................................. 21

TABLE 6: VBAT AND GND PINS ....................................................................................................................... 23

TABLE 7: ELECTRONIC CHARACTERISTICS OF VDD_EXT ........................................................................ 25

TABLE 8: PWRKEY PIN DESCRIPTION .......................................................................................................... 25

TABLE 9: RESET_N PIN DESCRIPTION ......................................................................................................... 29

TABLE 10: PIN DEFINITION OF THE MAIN UART INTERFACE ..................................................................... 31

TABLE 11: LOGIC LEVELS OF DIGITAL I/O .................................................................................................... 31

TABLE 12: PIN DEFINITION OF THE AUDIO INTERFACE ............................................................................. 35

TABLE 13: TYPICAL ELECTRET MICROPHONE CHARACTERISTIC ........................................................... 40

TABLE 14: TYPICAL SPEAKER CHARACTERISTIC ....................................................................................... 40

TABLE 15: PIN DEFINITION OF THE USIM INTERFACE ............................................................................... 41

TABLE 16: PIN DESCRIPTION OF MOLEX USIM CARD HOLDER ................................................................ 43

TABLE 17: PIN DESCRIPTION OF AMPHENOL USIM CARD HOLDER ........................................................ 44

TABLE 18: USB PIN DESCRIPTION ................................................................................................................ 45

TABLE 19: PIN DEFINITION OF THE ADC ...................................................................................................... 47

TABLE 20: CHARACTERISTIC OF THE ADC .................................................................................................. 47

TABLE 21: PIN DEFINITION OF NETWORK INDICATOR ............................................................................... 48

TABLE 22: WORKING STATE OF THE NETWORK INDICATOR .................................................................... 48

TABLE 23: PIN DEFINITION OF STATUS ........................................................................................................ 49

TABLE 24: PIN DEFINITION OF THE RF ANTENNA ....................................................................................... 50

TABLE 25: THE MODULE OPERATING FREQUENCIES ................................................................................ 50

TABLE 26: ANTENNA REQUIREMENTS .......................................................................................................... 51

TABLE 27: ABSOLUTE MAXIMUM RATINGS .................................................................................................. 52

TABLE 28: THE MODULE POWER SUPPLY RATINGS .................................................................................. 53

TABLE 29: OPERATING TEMPERATURE ........................................................................................................ 53

TABLE 30: THE MODULE CURRENT CONSUMPTION .................................................................................. 54

TABLE 31: THE MODULE CONDUCTED RF OUTPUT POWER .................................................................... 57

TABLE 32: THE MODULE CONDUCTED RECEIVING SENSITIVITY ............................................................. 58

TABLE 33: ELECTROSTATICS DISCHARGE CHARACTERISTICS ............................................................... 58

TABLE 34: RELATED DOCUMENTS ................................................................................................................ 66

TABLE 35: TERMS AND ABBREVIATIONS ...................................................................................................... 66

TABLE 36: DESCRIPTION OF DIFFERENT CODING SCHEMES .................................................................. 70

TABLE 37: DESCRIPTION OF DIFFERENT CODING SCHEMES .................................................................. 71

TABLE 38: EDGE MODULATION AND CODING SCHEME ............................................................................. 72

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Figure Index

FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 13

FIGURE 2: PIN ASSIGNMENT (TOP VIEW) .................................................................................................... 15

FIGURE 3: STAR STRUCTURE OF THE POWER SUPPLY ............................................................................ 24

FIGURE 4: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 24

FIGURE 5: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................... 26

FIGURE 6: TURN ON THE MODULE USING KEYSTROKE ........................................................................... 26

FIGURE 7: TIMING OF TURNING ON MODULE ............................................................................................. 27

FIGURE 8: TIMING OF TURNING OFF MODULE ........................................................................................... 28

FIGURE 9: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ........................................ 30

FIGURE 10: TIMING OF RESETTING MODULE ............................................................................................. 30

FIGURE 11: CONNECTION OF ALL FUNCTIONAL UART PORT ................................................................... 32

FIGURE 12: CONNECTION OF THREE LINES UART PORT ......................................................................... 32

FIGURE 13: CONNECTION OF UART PORT WITH HARDWARE FLOW CONTROL .................................... 33

FIGURE 14: 3.3V LEVEL MATCH CIRCUIT ..................................................................................................... 33

FIGURE 15: 5V LEVEL MATCH CIRCUIT ........................................................................................................ 34

FIGURE 16: RS232 LEVEL MATCH CIRCUIT .................................................................................................. 34

FIGURE 17: MICROPHONE REFERENCE DESIGN FOR MIC1&MIC2 .......................................................... 37

FIGURE 18: REFERENCE DESIGN FOR SPK1 .............................................................................................. 37

FIGURE 19: REFERENCE DESIGN WITH AN AMPLIFIER FOR SPK1 .......................................................... 38

FIGURE 20: REFERENCE DESIGN FOR SPK2 .............................................................................................. 38

FIGURE 21: REFERENCE DESIGN WITH AN AMPLIFIER FOR SPK2 .......................................................... 39

FIGURE 22: REFERENCE DESIGN FOR AN EARPHONE ............................................................................. 39

FIGURE 23: REFERENCE CIRCUIT OF THE 8 PIN USIM CARD ................................................................... 41

FIGURE 24: REFERENCE CIRCUIT OF THE 6 PIN USIM CARD ................................................................... 42

FIGURE 25: MOLEX 91228 USIM CARD HOLDER ......................................................................................... 43

FIGURE 26: AMPHENOL C707 10M006 512 2 USIM CARD HOLDER ........................................................... 44

FIGURE 27: REFERENCE CIRCUIT OF USB APPLICATION ......................................................................... 45

FIGURE 28: CONNECTION OF FIRMWARE UPGRADE ................................................................................ 46

FIGURE 29: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .......................................................... 48

FIGURE 30: REFERENCE CIRCUIT OF THE STATUS ................................................................................... 49

FIGURE 31: REFERENCE CIRCUIT OF ANTENNA INTERFACE ................................................................... 51

FIGURE 32: UC15 TOP AND SIDE DIMENSIONS ........................................................................................... 59

FIGURE 33: UC15 BOTTOM DIMENSIONS (BOTTOM VIEW) ....................................................................... 60

FIGURE 34: BOTTOM PADS DIMENSIONS (BOTTOM VIEW) ....................................................................... 61

FIGURE 35: RECOMMENDED FOOTPRINT (TOP VIEW) .............................................................................. 62

FIGURE 36: TOP VIEW OF THE MODULE ...................................................................................................... 63

FIGURE 37: BOTTOM VIEW OF THE MODULE .............................................................................................. 63

FIGURE 38: LIQUIDS TEMPERATURE ............................................................................................................ 65

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1 Introduction

This document defines the UC15 module and describes its hardware interface which are connected with

user’s application and the air interface.

This document can help users quickly understand module interface specifications, electrical and

mechanical details. Associated with application notes and user guide, users can use UC15 module to

design and set up mobile applications easily.

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1.1. Safety Information

The following safety precautions must be observed during all phases of the operation, such as usage,

service or repair of any cellular terminal or mobile incorporating UC15 module. Manufacturers of the cellular

terminal should send the following safety information to users and operating personnel and to incorporate

these guidelines into all manuals supplied with the product. If not so, Quectel does not take on any liability

for customer failure to comply with these precautions.

Full attention must be given to driving at all times in order to reduce the risk of an

accident. Using a mobie while driving (even with a handsfree kit) cause distraction

and can lead to an accident. You must comply with laws and regulations restricting

the use of wireless devices while driving.

Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it

switched off. The operation of wireless appliances in an aircraft is forbidden to

prevent interference with communication systems. Consult the airline staff about

the use of wireless devices on boarding the aircraft, if your device offers a Airplane

Mode which must be enabled prior to boarding an aircraft.

Switch off your wireless device when in hospitals or clinics or other health care

facilities. These requests are desinged to prevent possible interference with

sentitive medical equipment.

GSM cellular terminals or mobiles operate over radio frequency signal and cellular

network and cannot be guaranteed to connect in all conditions, for example no

mobile fee or an invalid USIM card. While you are in this condition and need

emergent help, please remember using emergency call. In order to make or

receive call, the cellular terminal or mobile must be switched on and in a service

area with adequate cellular signal strength.

Your cellular terminal or mobile contains a transmitter and receiver. When it is ON ,

it receives and transmits radio frequency energy. RF interference can occur if it is

used close to TV set, radio, computer or other electric equipment.

In locations with potencially explosive atmospheres, obey all posted signs to turn

off wireless devices such as your phone or other cellular terminals. Areas with

potencially exposive atmospheres including fuelling areas, below decks on boats,

fuel or chemical transfer or storage facilities, areas where the air contains

chemicals or particles such as grain, dust or metal powders.

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2 Product Concept

2.1. General Description

UC15 is an embedded HSDPA/EDGE engine. Its UMTS-based modem provides data connectivity on

HSDPA, WCDMA, EDGE(DL only), GPRS networks. UC15 offers a maximum data rate of 3.6Mbps on

downlink .UC15 also supports GPRS/EDGE multi-slot class 12. GPRS supports the coding schemes

CS-1, CS-2, CS-3 and CS-4. EDGE supports CS-1 to CS-4 and MCS-1 to MCS-9 coding schemes. UC15

contains two types UC15-A and UC15-E. Customer can choose the dedicated type based on the wireless

network configuration. The following table shows the entire radio band configuration of UC15 series.

Table 1: UC15 Series Frequency Bands

Module

GSM

850

EGSM

900

DCS

1800

PCS

1900

UMTS

850

UMTS

900

UMTS

1900

UMTS

2100

UC15-A z z z z z z

UC15-E z z z z

More details about GPRS/EDGE multi-slot configuration and coding schemes, please refer to Appendix B,

C and D.

With a tiny profile of 29.0mm × 29.0mm × 2.5mm, UC15 can meet almost all requirements for M2M

application such as automotive, metering, tracking system, security solutions, routers, wireless POS,

mobile computing devices, PDA phone and tablet PC, etc.

UC15 is an SMD type module, which can be embedded in customer application through its 108-pin pads

including 68 LCC signal pads and 40 other pads.

UC15 is integrated with internet service protocols like TCP/UDP and PPP. Extended AT commands have

been developed for customer to use these internet service protocols easily.

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2.2. Key Features

The following table describes the detailed features of UC15 module.

Table 2: UC15 Key Features

Feature Details

Power Supply

Supply voltage: 3.3V~4.4V.

Typical supply voltage: 3.8V.

Frequency Bands

GSM Quad-band: GSM850, EGSM900, DCS1800, PCS1900.

UMTS Dual-band: UC15-E 900/2100 MHz, UC15-A 850/1900 MHz.

Transmission Data

HSDPA R5: Max 3.6 Mbps (DL)

W-CDMA R99: Max 384 kbps (DL)/ Max 384 kbps (UL).

EDGE: Max 236.8 kbps (DL)

GPRS: Max 85.6 kbps (DL)/ Max 85.6 kbps (UL).

CSD: 64 kbps.

Transmitting Power

Class 4 (33dBm±2dB) for GSM850 and EGSM900.

Class 1 (30dBm±2dB) for DCS1800 and PCS1900.

Class E2 (27dBm±3dB) for GSM850 and EGSM900 8-PSK.

Class E2 (26dBm+3/-4dB) for DCS1800 and PCS1900 8-PSK.

Class 3 (24dBm+1/-3dB) for UMTS 850/900/1900/2100.

HSDPA and

WCDMA Features

HSDPA data rate is corresponded with 3GPP R5. 3.6 Mbps on

downlink.

WCDMA data rate is corresponded with 3GPP R99/R4. 384 kbps on

downlink and 384kbps on uplink.

Support both QPSK and 16-QAM modulations.

GSM/GPRS/EDGE

Data Features

GPRS:

Support GPRS multi-slot class 12 (10 by default).

Coding scheme: CS-1, CS-2, CS-3 and CS-4.

Maximum of four Rx time slots per frame.

EDGE:

Support EDGE multi-slot class 12 (12 by default).

Support GMSK and 8-PSK for different MCS (Modulation and Coding

scheme).

Downlink coding schemes: CS 1-4 and MCS 1-9.

CSD:

CSD transmission rates: 64 kbps non-transparent.

Support Unstructured Supplementary Services Data (USSD).

Internet Protocol Features

Support TCP/PPP/UDP protocols.

Support the protocols PAP (Password Authentication Protocol) and

CHAP (Challenge Handshake Authentication Protocol) usually used

for PPP connections.

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SMS

Text and PDU mode.

Point to point MO and MT.

SMS cell broadcast.

SMS storage: ME by default.

USIM Interface

Support USIM card: 1.8V, 3V.

Support USIM and SIM.

Audio Features

Support two analogy input channels and two analogy output channels.

GSM: HR/FR/EFR/AMR.

WCDMA: AMR.

Echo cancellation and noise suppression.

UART Interface

Seven lines on UART interface.

Support RTS and CTS hardware flow control.

Baud rate can reach up to 460800bps, 115200 bps by default.

Used for AT command, data transmission .

USB Interface

Compliant with USB 2.0 specification (slave only), the data transfer

rate can reach up to 480 Mbps.

Used for AT command communication, data transmission, software

debug and firmware upgrade.

USB Driver: Support Windows XP, Windows Vista, Windows7,

Windows 8, Windows CE5.0*/6.0*, Linux 2.6/3.0, Android 2.3/4.0.

AT Commands

Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT

commands.

Network Indication Indicate network connectivity status.

Antenna Interface Connected via 50 Ohm antenna pad.

Physical Characteristics

Size: 29.0±0.15 × 29.0±0.15 × 2.5±0.2 mm.

Weight: approx. 6 g.

Temperature Range

Normal operation: -40°C ~ +80°C.

Restricted operation: -45°C ~ -40°C and +80°C ~ +85°C 1).

Storage temperature: -40°C ~ +90°C.

Firmware Upgrade USB interface(by default) .

RoHS All hardware components are fully compliant with EU RoHS directive.

means

when the module works within this temperature range, RF performance might degrade. For

example, the frequency error or the phase error would increase.

NOTES

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2.3. Functional Diagram

The following figure shows a block diagram of UC15 and illustrates the major functional parts.

z Power management

z Baseband

z DDR+NAND flash

z Radio frequency

z Peripheral interface

--UART interface

--USIM card interface

--USB interface

--AUDIO interface

--ADC interface

--Status indication

--Control interface

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Figure 1: Functional Diagram

2.4. Evaluation Board

In order to help user to develop applications with UC15, Quectel supplies an evaluation board (EVB),

RS-232 to USB cable, USB data cable, power adapter, earphone, antenna and other peripherals to

control or test the module. For details, please refer to document [2].

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3 Application Interface

3.1. General Description

UC15 is equipped with a 68-pin 1.3mm pitch SMT pads plus 40-pin ground pads and reserved pads that

connect to customer’s cellular application platform. Sub-interfaces included in these pads are described in

detail in the following chapters:

z Power supply

z UART interface

z Audio interface

z USIM interface

z USB interface

z ADC interface

z Status indication

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3.2. Pin Assignment

The following figure shows the pin assignment of the UC15 module.

RESET_N

PWRKEY

AGND

SPK2P

SPK1N

SPK1P

MIC1P

MIC1N

MIC2P

MIC2N

RESERVED

USB_VBUS

USB_DM

USB_DP

RXD

TXD

DTR

RTS

CTS

DCD

STATUS

VBAT_BB

VBAT_RF

GND

Figure 2: Pin Assignment (Top view)

Keep all reserved pins and unused pins unconnected.

NOTE

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3.3. Pin Description

The following tables show the UC15’s pin definition.

Table 3: IO Parameters Definition

Type Description

IO Bidirectional input / output

DI Digital input

DO Digital output

PI Power input

PO Power output

AI Analog input

AO Analog output

Table 4: Pin Description

Power Supply

Pin Name Pin No. I/O Description DC Characteristics Comment

VBAT_BB 52,53 PI

Power supply for

module baseband

part.

Vmax = 4.4V

Vmin = 3.3V

Vnorm = 3.8V

It must be able to

provide sufficient

current up to 0.8A.

VBAT_RF 50,51 PI

Power supply for

module RF part.

Vmax = 4.4V

Vmin = 3.3V

Vnorm = 3.8V

It must be able to

provide sufficient

current in a transmitting

burst which typically

rises to 2.0A.

VDD_EXT 7 PO

Provide 2.6V for

external circuit.

Vnorm = 2.6V

max = 100mA

If unused, keep this pin

open.

Recommend to add a

2.2~4.7uF bypass

capacitor when using

this pin for power

supply.

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GND

42,44~49

65,67~68

71~73,81

~108

Ground.

Turn On/Off

Pin Name Pin No. I/O Description DC Characteristics Comment

PWRKEY 18 DI

Turn on/off the

module.

≈ 200kΩ

max = 2.1V

min = 1.6V

max = 0.3V

Pull-up to 1.8 V

internally.

RESET_N 17 DI RESET the module.

max = 2.1V

min = 1.6V

max = 0.3V

Pull-up to 1.8 V

internally.

Active low.

Status indication

Pin Name Pin No. I/O Description DC Characteristics Comment

STATUS 54 DO

Indicate the module

operating status.

max = 2.6V

min = 2.15V

max = 0.45V

2.6V power domain.

NETLIGHT 6 DO

Indicate the module

network activity

status.

max = 2.6V

min = 2.15V

max = 0.45V

2.6V power domain.

USB interface

Pin Name Pin No. I/O Description DC Characteristics Comment

USB_VBUS 64 PI USB detection.

Vmax = 5.25V

Vmin = 4.75V

Vnorm = 5.0V

USB_DP 62 IO

USB differential data

bus.

Compliant with USB

2.0 standard

specification.

Require differential

impedance of 90Ω.

USB_DM 63 IO

USB differential data

bus.

Compliant with USB

2.0 standard

specification.

Require differential

impedance of 90Ω.

USIM interface

Pin Name Pin No. I/O Description DC Characteristics Comment

UMTS/HSDPA Module

UC15 Hardware Design

UC15_Hardware_Design Confidential / Released 18 / 72

USIM_GND 8

Specified ground for

USIM card.

USIM_VDD 12 PO

Power supply for

USIM card.

For 1.8V USIM:

Vmax = 1.95V

Vmin = 1.65V

For 3V USIM:

Vmax = 3.3V

Vmin = 2.7V

max = 150mA

Either 1.8V or 3V is

supported by the

module automatically.

USIM_DATA 13 IO

Data signal of USIM

card.

For 1.8V USIM:

max = 0.63V

min = 1.17V

max = 2.1V

max = 0.45V

min = 1.35V

For 3V USIM:

max = 1.05V

min = 1.95V

max=

USIM_VDD+0.3

max = 0.45V

min=

0.7*USIM_VDD

Pull-up to USIM_VDD

with 10k resistor

internally.

USIM_CLK 14 DO

Clock signal of USIM

card.

For 1.8V USIM:

max = 0.45V

min = 1.35V

For 3V USIM:

max = 0.45V

min=

0.7*USIM_VDD

USIM_RST 15 DO

Reset signal of

USIM card.

For 1.8V USIM:

max = 0.45V

min = 1.35V

For 3V USIM:

max = 0.45V

min=

0.8*USIM_VDD

UMTS/HSDPA Module

UC15 Hardware Design

UC15_Hardware_Design Confidential / Released 19 / 72

USIM_

PRESENCE

11 DI

USIM card input

detection.

min = -0.3V

max = 0.91V

min = 1.69V

max = 2.9V

2.6V power domain.

ADC interface

Pin Name Pin No. I/O Description DC Characteristics Comment

ADC0 41 AI

General purpose

analog to digital

converter.

Voltage range:

0V to 2.1V

ADC1 40 AI

General purpose

analog to digital

converter.

Voltage range:

0V to 2.1V

UART interface

Pin Name Pin No. I/O Description DC Characteristics Comment

RI 55 DO Ring indicator.

max = 0.45V

min = 2.15V

2.6V power domain.

DCD 56 DO

Data carrier

detection.

max = 0.45V

min = 2.15V

2.6V power domain.

CTS 57 DO Clear to send.

max = 0.45V

min = 2.15V

2.6V power domain.

RTS 58 DI Request to send.

min = -0.3V

max = 0.91V

min = 1.69V

max = 2.9V

2.6V power domain.

DTR 59 DI Data terminal ready.

min = -0.3V

max = 0.91V

min = 1.69V

max = 2.9V

2.6V power domain.

TXD 60 DO Transmit data.

max = 0.45V

min = 2.15V

2.6V power domain.

RXD 61 DI Receive data.

min = -0.3V

max = 0.91V

min = 1.69V

max = 2.9V

2.6V power domain.

RF interface

Pin Name Pin No. I/O Description DC Characteristics Comment

RF_ANT 43 IO RF antenna pad 50Ω impedance

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Quectel UC15 Hardware Design

Brand: Quectel

Model: UC15

Type: Hardware Design

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Quectel UC15 Hardware Design

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