www.austriamicrosystems.com/LED-Driver-ICs/AS1112

Revision 1.13

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AS1112

Datasheet - P i n o u t

4 Pinout

Pin Assignments

Figure 2. Pin Assignments (Top View)

Pin Descriptions

Table 2. Pin Descriptions

Pin Number

Pin Name

Description

1

CLK

Serial Data Shift Clock

2

SDI

Serial Data Input

3

MODE

Mode Select input with internal pulldown

MODE = GND: Selects greyscale mode (see Setting Greyscale Brightness on page 12).

4:11

OUT0:OUT7

Constant-Current Outputs 0:7

14:21

OUT8:OUT15

Constant-Current Outputs 8:15

22

XERR

Error Output

0 = LED open detection or overtemperature condition is detected.

1 = Normal operation.

23

SDO

Serial Data Output

24

GSCLK

Greyscale Clock. Reference clock for greyscale PWM control

25

TEST

Test Pin. This pin must be connected to GND (AS1112) to ensure normal operation.

XTEST

26

IREF

Reference Current Terminal

27

Power Supply Voltage

12,13,28

N/C

This pin must not be connected.

29

PD

Power Down input with internal pulldown (AS1112)

0 = normal operation mode

1 = powerdown mode

N/C

Not Connected (AS1112B, AS1112C)

30

GND

Ground

31

OEN

Blank Outputs

0 = OUTn outputs are controlled by the greyscale PWM control.

1 = OUTn outputs are forced off; the greyscale counter is reset.

32

LD

Data Latch. The internal connections are switched by pin MODE.

For LD (MODE = GND), the greyscale register receives new data.

33

Thermal Pad

Thermal Pad. This pin must be connected to GND to ensure normal operation.

Thermal

Pad

24 GSCLK

23 SDO

22 XERR

21 OUT15

20 OUT14

19 OUT13

18 OUT12

17 OUT11

8

OUT4

7

OUT3

6

OUT2

5

OUT1

4

OUT0

3

MODE

2

SDI

1

CLK

AS1112

Thermal

Pad

24 GSCLK

23 SDO

22 XERR

21 OUT15

20 OUT14

19 OUT13

18 OUT12

17 OUT11

8

OUT4

7

OUT3

6

OUT2

5

OUT1

4

OUT0

3

MODE

2

SDI

1

CLK

AS1112B/C

33

33