Ver 1.1

22

LD1074

16-Channel Constant Current LED Driver With 16-Bit PWM Control and Dot-Correction

Compulsory Error Detection

LD1074 can also perform the compulsory error detection when receiving one LE pulse containing 4 DCLKs and

stop the compulsory error detection when receiving one LE pulse containing 0 DCLK. The output channels will be

forced to turned on within 700ns (between the LE falling edges) to perform the compulsory error detection. The error

report will be pushed out after compulsory error detection operation time (700ns). LD1074 will shift out both open

and short error reports from SDO simultaneously. The following is an illustration of the timing sequence of

compulsory error detection of 12-bit gray scale mode.

T1 T2

T192

T1 T2

T192

T1 T2

T4

PWM data

LE

DCLK

GCLK

Internal error

register

SDO

11111111…..

thermal

open error message

short error message

Thermal Alert Thermal Shutdown

157 bits

2 bits

16 bits

16 bits

OUT15

OUT0 OUT15

OUT0

Error detection time>700ns

SDI

Error report

Error report

Rext open

1 bits