AS1112
Datasheet - P i n o u t
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
XTEST 25
TEST 25
GND 30
GND 30
OEN 31
OEN 31
I
REF
26
I
REF
26
V
CC
27
V
CC
27
N/C 29
N/C 28
N/C 28
PD 29
LD 32
LD 32
CLK
SDI
MODE
OUT0
OUT1
OUT2
OUT3
OUT4
1
2
3
4
5
6
7
8
10 OUT6
12 N/C
13 N/C
14 OUT8
11 OUT7
9
OUT5
24 GSCLK
23 SDO
22 XERR
21 OUT15
20 OUT14
19 OUT13
33
15 OUT9
16 OUT10
18 OUT12
17 OUT11
CLK
SDI
MODE
OUT0
OUT1
OUT2
OUT3
OUT4
1
2
3
4
5
6
7
8
10 OUT6
12 N/C
13 N/C
14 OUT8
11 OUT7
9
33
15 OUT9
16 OUT10
24 GSCLK
23 SDO
22 XERR
21 OUT15
20 OUT14
19 OUT13
18 OUT12
17 OUT11
AS1112
Thermal
Pad
AS1112B
Thermal
Pad
OUT5
Pin Descriptions
Table 2. Pin Descriptions
Pin Number
1
2
3
4:11
14:21
22
23
24
25
26
27
12,13,28
Serial Data Shift Clock
Serial Data Input
Mode Select
input with internal pulldown
MODE = GND: Selects greyscale mode
MODE
MODE = V
CC
: Selects dot correction mode
OUT0:OUT7
Constant-Current Outputs 0:7
OUT8:OUT15
Constant-Current Outputs 8:15
Error Output
0 = LED open detection or overtemperature condition is detected.
XERR
1 = Normal operation.
Serial Data Output
SDO
Greyscale Clock.
Reference clock for greyscale PWM control
GSCLK
Test Pin
This pin must be connected to GND (AS1112) to ensure normal operation.
TEST
Test Pin
This pin must be connected to V
CC
(AS1112B) to ensure normal operation.
XTEST
Reference Current Terminal
I
REF
Power Supply Voltage
V
CC
This pin must not be connected.
N/C
Power Down
input with internal pulldown (AS1112)
0 = normal operation mode
PD
1 = powerdown mode
Not Connected
(AS1112B)
N/C
Ground
GND
Blank Outputs
0 = OUTn outputs are controlled by the greyscale PWM control.
OEN
1 = OUTn 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.
LD
For LD (MODE = V
CC
), the dot correction register receives new data.
Thermal Pad
Thermal Pad.
This pin must be connected to GND to ensure normal operation.
Revision 1.06
2 - 18
Pin Name
CLK
SDI
Description
29
30
31
32
33
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