AS1112 EB austriamicrosystems, AS1112 EB Datasheet - Page 8

• Manufacturer Part Number: AS1112 EB
• Description: BOARD EVAL AS1112
• Manufacturer: austriamicrosystems

Specifications of AS1112 EB

• Current - Output / Channel: 0.5 ~ 100 mA
• Outputs And Type: 16, Non-Isolated
• Voltage - Output: 0 ~ 15 V
• Features: Over-Temperature, Open-LED, Shorted-LED, Diagnostics
• Voltage - Input: 3 ~ 5.5 V
• Utilized Ic / Part: AS1112
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption

AS1112
Datasheet - D e t a i l e d D e s c r i p t i o n
9 Detailed Description
Serial Interface
The AS1112 features a versatile 3-pin (CLK, SDI, and SDO) serial interface, which can be connected to microcontrollers or digital signal proces-
sors in various configurations.
The rising edge of the CLK signal shifts data from pin SDI to the internal register. After all data is clocked in, the serial data is latched into the
internal registers at the rising edge of the LD signal.
Note: All data is clocked in with the MSB first.
Multiple AS1112 devices can be cascaded by connecting the SDO pin of one device with pin SDI of the next device
The SDO pin can also be connected to the microcontroller to receive status information from the AS1112. The serial data format is 96-bit or 192-
bit wide, depending on mode of the device
Figure 7. Serial Data Input Timing Diagram
Error Information Output
The open-drain output pin XERR indicates if the device is in one of the two error conditions: overtemperature flag or open LED detect. During
normal operation, the internal transistor connected to pin XERR is turned off and the voltage on XERR is pulled up to V
pullup resistor.
If an overtemperature or open LED condition is detected, the internal transistor is switched on, and XERR is pulled to GND. Because XERR is an
open-drain output, multiple AS1112 devices can be ORed together and pulled up to V
This reduces the number of signals needed to report a system error.
To differentiate the overtemperature flag from the open LED detect flag from pin XERR, the open LED detect flag can be masked out by setting
OEN = 1
www.austriamicrosystems.com/LED-Driver-ICs/AS1112
MODE
SDO
CLK
SDI
(see Table
LD
DCn-1
LSB
DCn-1
MSB
8).
MSB
DCn
1
Dot Correction Mode
MSB-1
DCn-1
Data Input Cycle
DCn-1
LSB
(see LD on page
96
DCn
LSB
t
H2
MSB
DCn
t
H3
t
SU2
2).
MSB
GSn
1
Revision 1.09
X
t
SU3
Greyscale Mode
Data Input Cycle
X
192
CC
with a single pullup resistor
GSn
LSB
t
H3
MSB
SID
t
SU2
(see Figure 15 on page
(see Figure 15 on page
DCn+1
Dot Correction Mode
MSB
CC
Data Input Cycle
1
through an external
X
MSB-1
DCn-1
2
8 - 19
15).
15).