AMS AS1121EvalKit User guide

AMS
Brand
AMS
Model
AS1121EvalKit
Type
User guide

This manual is also suitable for

AMS AS1121EvalKit is an evaluation board for the AS1121, a 16-Channel LED Driver with Dot Correction and Greyscale PWM. It allows users to evaluate the features and performance of the AS1121, and to develop and test LED lighting applications.

The AS1121EvalKit includes a fully assembled and tested AS1121 board, as well as an RGB LED board and a single color LED board. The AS1121 board features a 16-channel LED driver with dot correction and greyscale PWM, as well as a serial data interface for control. The RGB LED board features three high-brightness RGB LEDs, and the single color LED board features three high-brightness white LEDs.

AMS AS1121EvalKit is an evaluation board for the AS1121, a 16-Channel LED Driver with Dot Correction and Greyscale PWM. It allows users to evaluate the features and performance of the AS1121, and to develop and test LED lighting applications.

The AS1121EvalKit includes a fully assembled and tested AS1121 board, as well as an RGB LED board and a single color LED board. The AS1121 board features a 16-channel LED driver with dot correction and greyscale PWM, as well as a serial data interface for control. The RGB LED board features three high-brightness RGB LEDs, and the single color LED board features three high-brightness white LEDs.

austriamicrosystems AG
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ams AG
The technical content of this austriamicrosystems document is still valid.
Contact information:
Headquarters:
ams AG
Tobelbaderstrasse 30
8141 Unterpremstaetten, Austria
Tel: +43 (0) 3136 500 0
e-Mail: ams_sales@ams.com
Please visit our website at www.ams.com
AS1121 - Demo Board Manual
www.austriamicrosystems.com
Revision 2.03
1 - 8
Demo Board Manual
AS1121
16-Channel LED Driver with Dot Correction and
Greyscale PWM
www.austriamicrosystems.com/LED-Driver-ICs
ams AG
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www.austriamicrosystems.com
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General Description
Board Description
Supply Description
Label Name Description Info
A
VDD
Supply Voltage
Supply voltage ranging from 3.1V to 3.6V
B
GND
Ground
C
VLED
Supply Voltage for the LED’s
The output current drivers of the AS1121 can
handle up to +30V.
I/O - Interface Connector Description
Label Name Description Info
D
IN
Line In Connector
Can be connected to OUT “E” of the
previous board.
E
OUT
Line Out Connector
Can be connected to IN “D” of the next
board.
F
LED
Connector to LED board
Can be connected to the RGB LED board,
single color LED board or customer board.
G
SDO
Serial Data Output
GSCLK
Greyscale Clock
Reference clock for greyscale PWM control
LD
Serial Data Load
Data transferred at the rising edge
CLK
Serial Data Shift Clock
SDI in
Serial Data Input
XERR
Error Output
0: LED open detection or over temperature
condition is detected
1: normal operation
SDI out
Serial Data Output
OEN
Output Enable
0: Output drivers enabled
1: Output drivers disabled
MODE
Mode Select Input
0: greyscale mode
1: dot correction mode
Figure 1: Board Description
Figure 3: Output Line “E”
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Jumper Description
Label Name Description Info
H
Chain
Connect more
devices in series
YES: more AS1121 are connected together
NO: only one AS1121 is used
I
PD
Power Down
PD-OFF: Normal Operation Mode
PD-ON: Power Down Mode
J
RIref
User Resistor
Connector for resistor to set the load current.
K
Open LED
Open Detection
Remove Jumper to simulate an open circuit.
L
VCC->VLED
LED Supply Voltage
Remove Jumper to use external LED supply
voltage via connector VLED “C”.
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Quickstart
Hardware
Connect the demo board via the adapter board with the austriamicrosystems USB box, like shown in the picture
below.
Software
Before starting the software make sure that the austriamicrosystems USB box is connected to the AS1121 demo
board and a supply (3.1V to 3.6V) is connected to the AS1121 demoboard.
To quickly turn on all LEDs activate the Direct Mode and All On/Off check boxes (marked red in the figure
below). In the box Source Selection the Dot correction and the PWM need to be set to a value unlike 0.
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Operational sequence
This demo board comes with the AS1121.
1. Drive the IC on the demo board only with the recommended settings and values as described in the
datasheet. If not present get the datasheet for the AS1121 from http://www.austriamicrosystems.com.
2. Place an external resistor in RIref “J” to set the LED current.
3. Connect a +3.1V to +3.6V power supply (VDD “A” and GND “B”).
4. The LEDs are supplied via VDD. If necessary remove jumper VCC->VLED “L” and connect a voltage
supply to connector VLED “C”. The output drivers sustain a maximum voltage of +30V at the pin.
5. Connect the Serial Data Interface via Line IN “D”. For the data format of the serial interface please see
the datasheet of the AS1112.
If there are questions do not hesitate to contact us. See contact information at the end of this manual.
Available LED boards
The following two boards are included to the demo board and can be connected to the AS1121 board.
Figure 4: single color LED board
Figure 5: RGB LED board
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Layout of Demo Board
Board schematics
Figure 6: Schematic – AS1121 board
Figure 7: Schematic – RGB LED board Figure 8: Schematic – single color LED board
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Board layout
Figure 9: Top and Bottom Layer – AS1121 board
Figure 10: Top and Bottom Layer – RGB LED board Figure 11: Top and Bottom Layer – single color LED board
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Copyright
Copyright © 1997-2011, austriamicrosystems AG, Tobelbaderstraße 30, 8141 Unterpremstätten - Graz, Austria -
Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted,
merged, translated, stored, or used without the prior written consent of the copyright owner.
All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions
appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by
description regarding the information set forth herein or regarding the freedom of the described devices from
patent infringement. Austriamicrosystems AG reserves the right to change specifications and prices at any time
and without notice. Therefore, prior to designing this product into a system, it is necessary to check with
austriamicrosystems AG for current information.
This product is intended for use in normal commercial applications. Applications requiring extended temperature
range, unusual environmental requirements, or high reliability applications, such as military, medical life-support
or life-sustaining equipment are specifically not recommended without additional processing by
austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might
show deviations from the standard production flow, such as test flow or test location.
The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However,
austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not
limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect,
special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing,
performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise
or flow out of austriamicrosystems AG rendering of technical or other services.
Contact Information
Headquarters
austriamicrosystems AG
Tobelbaderstraße 30
A-8141 Unterpremstätten - Graz, Austria
T. +43 (0) 3136 500 0
F. +43 (0) 3136 5692
For Sales Offices, Distributors and Representatives, please visit:
http://www.austriamicrosystems.com/contact
ams AG
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AMS AS1121EvalKit User guide

AMS
Brand
AMS
Model
AS1121EvalKit
Type
User guide
This manual is also suitable for

AMS AS1121EvalKit is an evaluation board for the AS1121, a 16-Channel LED Driver with Dot Correction and Greyscale PWM. It allows users to evaluate the features and performance of the AS1121, and to develop and test LED lighting applications.

The AS1121EvalKit includes a fully assembled and tested AS1121 board, as well as an RGB LED board and a single color LED board. The AS1121 board features a 16-channel LED driver with dot correction and greyscale PWM, as well as a serial data interface for control. The RGB LED board features three high-brightness RGB LEDs, and the single color LED board features three high-brightness white LEDs.

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