2015-2020 Microchip Technology Inc. DS40001804D
Curiosity Low Pin Count (LPC)
Development Board
User’s Guide
DS40001804D-page 2 2015-2020 Microchip Technology Inc.
Information contained in this publication regarding device
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and may be superseded by updates. It is your responsibility to
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Note the following details of the code protection feature on Microchip devices:
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Trademarks
The Microchip name and logo, the Microchip logo, Adaptec,
AnyRate, AVR, AVR logo, AVR Freaks, BesTime, BitCloud, chipKIT,
chipKIT logo, CryptoMemory, CryptoRF, dsPIC, FlashFlex,
flexPWR, HELDO, IGLOO, JukeBlox, KeeLoq, Kleer, LANCheck,
LinkMD, maXStylus, maXTouch, MediaLB, megaAVR, Microsemi,
Microsemi logo, MOST, MOST logo, MPLAB, OptoLyzer,
PackeTime, PIC, picoPower, PICSTART, PIC32 logo, PolarFire,
Prochip Designer, QTouch, SAM-BA, SenGenuity, SpyNIC, SST,
SST Logo, SuperFlash, Symmetricom, SyncServer, Tachyon,
TempTrackr, TimeSource, tinyAVR, UNI/O, Vectron, and XMEGA
are registered trademarks of Microchip Technology Incorporated in
the U.S.A. and other countries.
APT, ClockWorks, The Embedded Control Solutions Company,
EtherSynch, FlashTec, Hyper Speed Control, HyperLight Load,
IntelliMOS, Libero, motorBench, mTouch, Powermite 3, Precision
Edge, ProASIC, ProASIC Plus, ProASIC Plus logo, Quiet-Wire,
SmartFusion, SyncWorld, Temux, TimeCesium, TimeHub,
TimePictra, TimeProvider, Vite, WinPath, and ZL are registered
trademarks of Microchip Technology Incorporated in the U.S.A.
Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any
Capacitor, AnyIn, AnyOut, BlueSky, BodyCom, CodeGuard,
CryptoAuthentication, CryptoAutomotive, CryptoCompanion,
CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average
Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial
Programming, ICSP, INICnet, Inter-Chip Connectivity, JitterBlocker,
KleerNet, KleerNet logo, memBrain, Mindi, MiWi, MPASM, MPF,
MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach,
Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,
PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple
Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI,
SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC,
USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and
ZENA are trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated in
the U.S.A.
The Adaptec logo, Frequency on Demand, Silicon Storage
Technology, and Symmcom are registered trademarks of Microchip
Technology Inc. in other countries.
GestIC is a registered trademark of Microchip Technology Germany
II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in
other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2015-2020, Microchip Technology Incorporated, All Rights
Reserved.
ISBN: 978-1-5224-5890-6
For information regarding Microchip’s Quality Management Systems,
please visit www.microchip.com/quality.
CURIOSITY LOW PIN COUNT DEVELOPMENT
BOARD USER’S GUIDE
2015-2020 Microchip Technology Inc. DS40001804D-page 3
Table of Contents
Preface ........................................................................................................................... 4
Chapter 1. Introduction to Curiosity Low Pin Count (LPC)
1.1 Curiosity Low Pin Count (LPC) Development Board Kit Contents ................. 8
Chapter 2. Getting Started
2.1 Programming the Curiosity Low Pin Count (LPC) Development Board ....... 10
2.1.1 Programming Using MPLAB® X IDE ........................................................ 10
Chapter 3. Troubleshooting
3.1 The MCU Will Not Program Using The PKOB ............................................. 14
3.2 The MPLAB PICkit™ 4 On-Board (PKOB4) Does Not Perform ................... 14
Appendix A. Schematic
A.1 Curiosity LPC Development Board Schematics ........................................... 15
Appendix B. General Notes
B.1 mikroBus™ Clicks ........................................................................................ 20
B.2 Solder Blob Jumper ..................................................................................... 20
Worldwide Sales and Service .................................................................................... 21
2015-2020 Microchip Technology Inc. DS40001804D-page 4
CURIOSITY LOW PIN COUNT DEVELOPMENT
BOARD USER’S GUIDE
Preface
INTRODUCTION
This chapter contains general information that will be useful to know before using the
Curiosity LPC Development Board. Items discussed in this chapter include:
• Document Layout
• Conventions Used in this Guide
• Recommended Reading
• The Microchip Website
• Development Systems Customer Change Notification Service
• Customer Support
• Revision History
DOCUMENT LAYOUT
This document describes how to use the Curiosity LPC Development Board as a
development tool to emulate and debug firmware on a target board. The document is
organized as follows:
• Chapter 1. “Introduction to Curiosity Low Pin Count (LPC)” – This chapter
contains general information regarding the Curiosity LPC Development Board kit
contents, layout and power source.
• Chapter 2. “Getting Started” – This chapter offers information on how to
program the Curiosity LPC Development Board.
• Chapter 3. “Troubleshooting” – Consult this chapter for troubleshooting
information.
• Appendix A. “Schematic” – This appendix lists the Curiosity LPC Development
Board schematic.
• Appendix B. “General Notes” – Refer to this appendix for general notes on
using the Click module sockets and the solder blob jumpers.
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our website
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the
document.
For the most up-to-date information on development tools, see the MPLAB
®
IDE online help.
Select the Help menu, and then Topics to open a list of available online help files.
DS40001804D-page 5 2015-2020 Microchip Technology Inc.
Curiosity Low Pin Count Development Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENT CONVENTIONS
Description Represents Examples
Arial font:
Italic characters Referenced books MPLAB IDE User’s Guide
Emphasized text ...is the only compiler...
Initial caps A window the Output window
A dialog the Settings dialog
A menu selection select Enable Programmer
Quotes A field name in a window or
dialog
“Save project before build”
Underlined, italic text with
right angle bracket
A menu path File>Save
Bold characters A dialog button Click OK
A tab Click the Power tab
N‘Rnnnn A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
4‘b0010, 2‘hF1
Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>
Courier New font:
Plain Courier New Sample source code #define START
Filenames autoexec.bat
File paths c:\mcc18\h
Keywords _asm, _endasm, static
Command-line options -Opa+, -Opa-
Bit values 0, 1
Constants 0xFF, ‘A’
Italic Courier New A variable argument file.o, where file can be
any valid filename
Square brackets [ ] Optional arguments mcc18 [options] file
[options]
Curly brackets and pipe
character: { | }
Choice of mutually exclusive
arguments; an OR selection
errorlevel {0|1}
Ellipses... Replaces repeated text var_name [,
var_name...]
Represents code supplied by
user
void main (void)
{ ...
}
Preface
2015-2020 Microchip Technology Inc. DS40001804D-page 6
RECOMMENDED READING
This user’s guide describes how to use the Curiosity LPC Development Board. For the
latest information on using other tools, refer to the MPLAB
®
X IDE home page:
www.microchip.com/mplab/mplab-x-ide. This resource page contains updated
documentation, downloads and links to other MPLAB X compatible tools, plug-ins and
much more.
THE MICROCHIP WEBSITE
Microchip provides online support via our website at www.microchip.com. This website
is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the website contains the following
information:
• Product Support – Data sheets and errata, application notes, sample programs
and labs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
Curiosity Development Board-specific product support can be accessed via our
website at www.microchip.com/promo/curiosity-development-boards.
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE
Microchip’s customer notification service helps keep customers current on Microchip
products. Subscribers will receive e-mail notification whenever there are changes,
updates, revisions or errata related to a specified product family or development tool of
interest.
To register, access the Microchip website at www.microchip.com, click on Customer
Change Notification and follow the registration instructions.
The Development Systems product group categories are:
• Compilers – The latest information on Microchip C compilers, assemblers, linkers
and other language tools. These include all MPLAB C compilers; all MPLAB
assemblers (including MPASM™ assembler); all MPLAB linkers (including
MPLINK™ object linker); and all MPLAB librarians (including MPLIB™ object
librarian).
• Emulators – The latest information on Microchip in-circuit emulators.This
includes the MPLAB REAL ICE™ and MPLAB ICE 2000 in-circuit emulators.
• In-Circuit Debuggers – The latest information on the Microchip in-circuit
debuggers. This includes MPLAB ICD 3 in-circuit debuggers and PICkit™ 3
debug express.
• MPLAB IDE – The latest information on Microchip MPLAB IDE, the Windows
®
Integrated Development Environment for development systems tools. This list is
focused on the MPLAB IDE, MPLAB IDE Project Manager, MPLAB Editor and
MPLAB SIM simulator, as well as general editing and debugging features.
• Programmers – The latest information on Microchip programmers. These include
production programmers such as MPLAB REAL ICE in-circuit emulator, MPLAB
ICD 3 in-circuit debugger and MPLAB PM3 device programmers. Also included
are nonproduction development programmers such as PICSTART
®
Plus and
PICkit 2 and 3.
DS40001804D-page 7 2015-2020 Microchip Technology Inc.
Curiosity Low Pin Count Development Board User’s Guide
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
• Distributor or Representative
• Local Sales Office
• Field Application Engineer (FAE)
• Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers.
Technical support is available through the website at:
www.microchip.com/support.
REVISION HISTORY
Revision D (March 2020)
Added new layout revision and content updates.
Revision C (September 2019)
Updated Figures 2-1 through 2-4 and A-1.
Remove EU Declaration of Conformity.
Revision B (April 2016)
Added the EU Declaration of Conformity.
Revision A (July 2015)
Initial release of this document.
2015-2020 Microchip Technology Inc. DS40001804D-page 8
CURIOSITY LOW PIN COUNT DEVELOPMENT
BOARD USER’S GUIDE
Chapter 1. Introduction to Curiosity Low Pin Count (LPC)
The Curiosity Low Pin Count (LPC) Development Board supports Microchip’s 8-, 14-
and 20-pin 8-bit PIC
®
MCUs. Dual-row expansion headers on either side of the socket
offer flexibility of connectivity to all pins on the PIC MCUs. Programming/debugging is
accomplished through the PICkit™ On-Board (PKOB), eliminating the need for an
external programming/debugging tool. This board provides flexibility for
experimentation through an application header with a ground (GND) and supply
voltage (V
SS) connections. It is also a set of indication LEDs, mTouch
®
button and push
button switches, and a variable potentiometer. Additionally, the Curiosity LPC Board
integrates a MikroElektronika mikroBUS™ socket, which can accommodate a variety
of plug-in Click™ Board modules that can be used for application development.
1.1 CURIOSITY LOW PIN COUNT (LPC) DEVELOPMENT BOARD KIT
CONTENTS
The Curiosity Low Pin Count (LPC) Development Board kit contains the following:
• Curiosity Low Pin Count (LPC) Development Board
• Quick Start Guide
• PIC16F18446 MCU
FIGURE 1-1: CURIOSITY LOW PIN COUNT (LPC) DEVELOPMENT BOARD
REV 2
mTouch®
Button
™
2015-2020 Microchip Technology Inc. DS40001804D-page 9
FIGURE 1-2: CURIOSITY LOW PIN COUNT (LPC) DEVELOPMENT BOARD
REV 4
2015-2020 Microchip Technology Inc. DS40001804D-page 10
CURIOSITY LOW PIN COUNT DEVELOPMENT
BOARD USER’S GUIDE
Chapter 2. Getting Started
The Curiosity Low Pin Count (LPC) Development Board contains a PICkit On-Board
(PKOB) which allows for both low-voltage programming and low-voltage in-circuit
debugging for all supported devices. When used with the MPLAB IDE, in-circuit
debugging allows the user to run, modify, and troubleshoot their custom software and
hardware quickly, without the need for additional debugging tools.
2.1 PROGRAMMING THE CURIOSITY LOW PIN COUNT (LPC) DEVELOPMENT
BOARD
Programming the Curiosity LPC Development Board can be accomplished through
MPLAB X IDE (version 3.30 or higher for Rev 2 and version 5.20 or higher for Rev 4).
2.1.1 Programming Using MPLAB
®
X IDE
1. Connect the Curiosity LPC Board to the computer using the on-board micro-USB
connector.
2. Open MPLAB X IDE and either create a new project or open an existing one.
3. Click on the Project Properties icon located in the project’s Dashboard window
(as seen in Figure 2-1). Alternatively, the Project Properties window can be
opened by clicking on File > Project Properties
, or by right clicking on the project
name in the Projects window and clicking Properties.
Note: The Curiosity LPC Board must be programmed using Low-Voltage
Programming (LVP). The LVP bit of the Configuration Word(s) must be set
(LVP = ON or ‘1’).
2015-2020 Microchip Technology Inc. DS40001804D-page 11
FIGURE 2-1: PROJECT PROPERTIES BUTTON
4. The Project Properties window will open. This window allows for the selection of
the programming tool, compiler and PIC MCU. MPLAB X IDE refers to the
Curiosity LPC Board as “Starter Kits” in the Hardware Tool selection window, as
seen in Figure 2-2.
FIGURE 2-2: SELECTING THE CURIOSITY LPC DEVELOPMENT BOARD
5. In the upper left-hand corner of the Project Properties window, click on Starter
Kits (PKOB). The window will now show the configuration options for the PKOB
programmer, as shown in Figure 2-3.
2015-2020 Microchip Technology Inc. DS40001804D-page 12
FIGURE 2-3: PROGRAM OPTIONS FOR THE PICkit™ ON-BOARD (PKOB)
6. In the Option categories drop-down menu, select Program Options; ensure that
the Low Voltage Programming mode is selected for Programming mode entry
(Figure 2-4). The Curiosity LPC Board is now ready to be programmed.
FIGURE 2-4: ENSURE LOW-VOLTAGE PROGRAMMING IS ENABLED
2015-2020 Microchip Technology Inc. DS40001804D-page 14
CURIOSITY LOW PIN COUNT DEVELOPMENT
BOARD USER’S GUIDE
Chapter 3. Troubleshooting
This chapter discusses common operational issues and methods to resolve them.
3.1 THE MCU WILL NOT PROGRAM USING THE PKOB
The Curiosity LPC Development Board’s PICkit On-Board (PKOB) uses low-voltage
programming. Both MPLAB X IDE and MPLAB Xpress set the Low-Voltage
Programming (LVP) bit to a ‘1’, allowing low-voltage programming.
1. When using custom firmware, the LVP bit must be set to ‘1’ in the Configuration
Word. MPLAB X IDE will not allow programming using the PKOB unless the bit
is properly configured.
2. When using a PIC microcontroller (one not included with the Curiosity
Development Board) that has already been programmed using high-voltage
programming and the LVP bit is cleared (LVP = OFF or ‘0’), the device will not be
recognized and cannot be programmed using the PKOB. Reprogramming the
device can be achieved by one of the following two methods:
a) Connect a PICkit™ 3 Programmer to the PIC device dual-row expansion
headers, ensuring the appropriate ICSP™, GND, and V
DD connections are
made. Configure MPLAB IDE to use the PICkit 3 as the programmer, and
ensure the LVP bit is set to ‘1’ in the Configuration Word. Reprogram the
device.
b) Use an unprogrammed (blank) device and ensure the LVP bit is set to ‘1’ in
the Configuration Word.
3.2 THE MPLAB PICKIT™ 4 ON-BOARD (PKOB4) DOES NOT PERFORM
Use the Hardware Tool Emergency Boot Firmware Recovery Utility to restore hard-
ware tool boot firmware to its factory state. The recovery utility window can be opened
by clicking on Debug > Hardware Tool Emergency Boot Firmware Recovery Utility
in
MPLAB X IDE.The Curiosity LPC Development Board’s PICkit On-Board (PKOB) uses
low-voltage programming. Both MPLAB X IDE and MPLAB Xpress sets the Low-Volt-
age Programming (LVP) bit to a ‘1’, allowing low-voltage programming.
2015-2020 Microchip Technology Inc. DS40001804D-page 15
CURIOSITY LOW PIN COUNT DEVELOPMENT
BOARD USER’S GUIDE
Appendix A. Schematic
A.1 CURIOSITY LPC DEVELOPMENT BOARD SCHEMATICS
FIGURE A-1: CURIOSITY LPC DEVELOPMENT BOARD SCHEMATIC REV 2 (1 OF 1)
1
1
2
2
3
3
4
4
5
5
6
6
D D
C C
B B
A A
1 of 1
Curiosity
8/8/2018 9:11:25 AM
03-10327 sheet 1.SchDoc
Project Title
Sch #: Date:
File:
Revision: Sheet
Designed with
Drawn By:
Jamus Griego
Sheet Title
**
Engineer:
John Mouton
03-10327
2.2
Size
B
10327
PartNumber:
Altium.com
TACT SPST
S2
TACT SPST
S1
RED
D4
HDR-2.54 Female 2x10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
J11
1k
R40
1k
R41
10k
R38
10k
R29
470R
R39
470R
R31
VDD
VDD
GND GND GND GND
GND
GND
GND
VDD
HDR-2.54 Male 2x4
1
1
2
34
56
78
J13
PJ-002BH-SMT
2
3
1
J15
0.1uF
25V
C16
GND
LM340MP-5.0
GND
2
VIN
1
VOUT
3
U5
US1M
D3
0.22uF
C17
GND
VDD
RB5
HDR-2.54 Male 1x2
12
J4
TP2
TP1
GREEN
D2
470R
R35
GND
VDD
HDR-2.54 Female 2x10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
J9
HDR-2.54 Male 1x2
12
J3
470R
R32
110-91-320-41-001
4
5
6
7
8
9
10
16
15
14
13
12
11
17
1
2
3
19
18
20
U4
0.1uF
25V
C15
RED
D5
RED
D6
RED
D7
PGED
PGEC
1k
R42
1k
R43
HDR-2.54 Male 1X6 STAGGERD
1
2
3
4
5
6
P1
HDR-2.54 Male 1x3
123
J12
mikroBUS
AN
1
AN
RST
2
CS
3
SCK
4
MISO
5
MOSI
6
+3.3V
7
GND
8
PWM
16
INT
15
RX
14
TX
13
SCL
12
SDA
11
+5V
10
GND
9
J35
HDR-2.54 Female 1x8
1
2
3
4
5
6
7
8
J34
HDR-2.54 Female 1x8
1
2
3
4
5
6
7
8
J33
0R
0402
R33
mTouch
S3
HDR-2.54 Male 1x2
12
J5
0R
0402
R44
10k
R37
RC0
RC1
GND
0R
R46
0R
0402
R34
+5V
+5V
POWER
0R
R47
0R
R48
0R
R49
0R
R50
RC7 RC7
RB7 RB7
RC3
RC4
RC5
RC6
RA4
RA5
nMCLR
RC3
RC4
RC5
RC6
RA4
RA5
nMCLR
VDD
RC0
RC1
RC2
RB4
RB5
RB6
RB4
RB5
RB6
RC0
RC1
RC2
RA2 RA2
PGED
PGEC
PGED
PGEC
RC4
nMCLR
PGEC
PGED
ICSP_VDD
ICSP_VDD
nMCLR
HDR-2.54 Male 1x2
12
J6
VDD
RA5
PGEC
RA2
RC5
VDD
GND
GND
0R
R51
0R
R53
0R
R55
0R
R57
RB4
RC6
RB6
RC7
1
2
3
4
5
6
7
8
HDR-2.54 Male 2x4
J39
SCK
SCK
MISO
MISO
MOSI
MOSI
CS
CS
SCK
MISO
MOSI
CS
RB4
RC6
RB6
RC7
0R
R52
0R
R54
0R
R56
0R
R58
RB6
RB4
RB5
RB7
1
2
3
4
5
6
7
8
HDR-2.54 Male 2x4
J40
RX
TX
SCL
SDA
RB6
RB4
RB5
RB7
RX
TX
SCL
SDA
RX
TX
SCL
SDA
DNP DNP
DNP
DNP
DNP
DNP
VDD
D_VBUS +5V
VCMP
GND
MCP6561
+A
3
-A
4
OUTA
1
VSS
2
VDD
5
+
A
-A
OUTA
VSS
VDD
A
A
A
A
A
S
D
U16
VREF_2.5V
TP4
TP3
10k
R61
RC2
RA4
RC5
RA2
+5V+3.3V
GND GND
2k
0603
R59
VCMP
+9V
+5V
+3.3V
10k
2
1 3
POT1
GND
1
AIO2
2
AIO1
3
AIO0
4
UART_TX
5
UART_RX
6
WAKE_SW
7
CMD/MLDP
8
GND
9
LED/PIO1/SCK
10
MLDP_EV/PIO2/CS
11
WS/PIO3/MOSI
12
PIO4/MISO
13
CTS/PIO5
14
WAKE_HW
15
GND
16
SPI/PIO
17
RTS/PIO6
18
PIO7
19
RSVD
20
RSVD
21
RSVD
22
VDD
23
GND
24
G
N
D
AI
O
2
AI
O
1
AIO0
UART
_
TX
U
ART_RX
W
A
KE_
SW
C
MD/MLD
P
G
N
D
LED
/
PIO1
/
SC
K
MLDP_EV/PIO2/CS
WS
/PI
O
3/M
OS
I
PIO4
/
MISO
CTS
/
PIO
5
WAKE_H
W
G
N
D
S
PI/PI
O
R
T
S
/PI
O6
PI
O7
RSVD
RS
V
D
RSVD
V
D
D
G
N
D
RN4020
U6
+3.3V
GND
RX
TX
4.7uF
C18
RC0
DNP
DNP
DNP
DNP
DNP
0R
0603
R45
DNP
DNP
DNP
DNP
DNP
VIN
HDR-2.54 Female 1x6
1
2
3
4
5
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2015-2020 Microchip Technology Inc. DS40001804D-page 20
CURIOSITY LOW PIN COUNT DEVELOPMENT
BOARD USER’S GUIDE
Appendix B. General Notes
B.1 mikroBUS™ CLICKS
Module 1 is the main click socket, and Module 2 is the secondary socket. Both sockets
are fully compatible with a 40-pin PIC device; however, when using 28-pin devices, not
all pins are available.
All pins in Module 1 are available for use with the exception of the mikroBUS's Reset
(RST) signal, which is tied to pin RD0. PORT D is not available on 28-pin devices. If
the RST signal is needed, remove the solder blob jumper associated with the
mikroBUS RST connection, and place a jumper wire between the via next to the solder
blob jumper and the desired pin connection found in the J8 or J11 dual-row expansion
headers (see Figure 1-1).
All pins in Module 2 are available for use with the exception of the mikroBUS's Reset
(RST) signal (RD2), SPI Chip Select (CS
) signal (RD3), and the PWM (RD1) signal.
These signals are routed to the PORT D pins, which are not available on 28-pin PIC
devices. If these signals are needed, remove the solder blob jumpers associated with
the mikroBUS connection pins, and place jumper wires from the vias located next to
the associated solder blob jumpers to the desired pin connections found in the J8 or
J11 dual-row expansion headers (see Figure 1-1).
B.2 SOLDER BLOB JUMPER
Solder blob jumpers can be found on each Click module, push-button switch, LED, or
potentiometer connection. This allows the user to utilize those pin connections for other
applications.
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