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AS1112
Datasheet - P i n o u t
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
CLK
SDI
1
2
24 GSCLK
23 SDO
CLK
SDI
1
2
24 GSCLK
23 SDO
MODE
OUT0
OUT1
OUT2
OUT3
OUT4
3
4
5
6
7
8
AS1112
Thermal
Pad
33
22 XERR
21 OUT15
20 OUT14
19 OUT13
18 OUT12
17 OUT11
MODE
OUT0
OUT1
OUT2
OUT3
OUT4
3
4
5
6
7
8
AS1112B/C
Thermal
Pad
33
22 XERR
21 OUT15
20 OUT14
19 OUT13
18 OUT12
17 OUT11
Pin Descriptions
Table 2. Pin Descriptions
Pin Number
1
2
3
4:11
14:21
22
23
24
25
26
27
12,13,28
29
30
31
32
33
Pin Name
CLK
SDI
MODE
OUT0:OUT7
OUT8:OUT15
XERR
SDO
GSCLK
TEST
XTEST
IREF
V CC
N/C
PD
N/C
GND
OEN
LD
Thermal Pad
Description
Serial Data Shift Clock
Serial Data Input
Mode Select input with internal pulldown
MODE = GND: Selects greyscale mode (see Setting Greyscale Brightness on page 12) .
MODE = V CC : Selects dot correction mode (see Setting Dot Correction on page 11) .
Constant-Current Outputs 0:7
Constant-Current Outputs 8:15
Error Output
0 = LED open detection or overtemperature condition is detected.
1 = Normal operation.
Serial Data Output
Greyscale Clock. Reference clock for greyscale PWM control
Test Pin. This pin must be connected to GND (AS1112) to ensure normal operation.
Test Pin. This pin must be connected to V CC (AS1112B, AS1112C) to ensure normal operation.
Reference Current Terminal
Power Supply Voltage
This pin must not be connected.
Power Down input with internal pulldown (AS1112)
0 = normal operation mode
1 = powerdown mode
Not Connected (AS1112B, AS1112C)
Ground
Blank Outputs
0 = OUT n outputs are controlled by the greyscale PWM control.
1 = OUT n outputs are forced off; the greyscale counter is reset.
Data Latch. The internal connections are switched by pin MODE.
For LD (MODE = GND), the greyscale register receives new data.
For LD (MODE = V CC ), the dot correction register receives new data.
Thermal Pad. This pin must be connected to GND to ensure normal operation.
www.austriamicrosystems.com/LED-Driver-ICs/AS1112
Revision 1.13
2 - 19
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