TCA62746AFG Datasheet, PDF (16/25 Pages) Toshiba Semiconductor – 16-Output Constant Current LED Driver with Output Open/Short Detection

TCA62746AFG/AFNG
Reading Error Status Code
SCK
OE
n ^>= 3
12
3
MIN 2 µs
HL L
L
HHHHH
SOUT
Error status code
Bit
Bit Bit Bit Bit Bit
15
14 13 12 11 10
When the above signal sequence is set in the OOD and OSD modes, the error state code can be read through the
terminal SOUT.
Error state code of OOD detection mode
VOOD ≥ VO
VOOD < VO
Error state code
0
1
State of output terminal
Open circuit
Normal
Error state code of OSD detection mode
VOSD ≤ VO
VOSD > VO
Error state code
0
1
State of output terminal
Short circuit
Normal
Description
In the OOD and OSD modes, the state of OE must be switched from “H” to “L”. And, then, This IC would
execute Open-/Short-circuit Detection as well as enabling output ports to drive current.
At least three clock must be inputs at the “L” state of OE and the third clock should be at least 2 µs after
the falling edge of OE . the detected error status into the built-in shift register is done by rising edge of
this third clock.
When OE is “L", the serial data cannot be input from the terminal SIN.
When OE is changed from “L" to “H", the error state code is output from the terminal SOUT
synchronizing with the clock.
Switching to Normal Mode
SCK
123456
OE H L H H H H
SLAT L L L L L L
“L” level
The signal sequence set to be in the Normal mode.
16
2007-05-22