TLC6C5724-Q1: facing ERROR while sending the data in sending GS data and GLCK

Also the resistor connect to Iref in 2.4K.

Sequence which i sending data
1. VCC ON
2. Error Clear 
2. Global Reset
3. FCDCBC Write
4. GS Data send
5. Send GCLK 
6. FCDCBC Write 

At step 5 itself my error pin getting Low and most of the led is turned ON 

Hi Murali,

Our expert is currently out of office for Chinese New Year Holiday. She will reply to you after Feb.5 when back to office. Thanks for your understanding.

Best Regards,

Steven

Hi Murali,

Could you pls elaborate how you send GS data? You only want one LED out of 24*3 LEDs on? 

Here is the standard setting for TLC6C5724-Q1.TLC6C5724-Q1 EVM Programming.pptx

BR, Gracie

Hi Gracie Guo,
Thanks for your reply.
Yes i went to switch on the 1st out of 1st IC.
i sending 108 Byte GS data in which 107 Byte having the Value as 153 (0x99). remaining all byte as 0.
exactly at 9th GCLK pulse error pin getting LOW and while reading the SID data it is sending LSD2 as 1 for all the OUT. and LSD1 as 1 for R6, R7, G6, G7, B5, B6,B7. 
Could you please give more details why the LSD is set and what data we need to check for this issue?

Hi Murali,

This is correct behavior.

In some cases, users may need to turn off output channels before the 9th GCLK to disable output channels, or turn on output channels at Nth GCLK to get more brightness. LOD_LSD faults are reported as shown in Table 6.
Users can ignore the fault according to the GS register setting value.

If you don't want ERR pulled low constantly, You may use LED_ERR_MASK and monitor the LOD/LSD from software.

BR, Gracie 

Hi Gracie,

But all the Telltales is getting on when the ERROR is LOW how to resolve that. If it is a normal behavior why all the LED is getting on . Please help to identify that issue.

Hi Murali,

It's abnormal for sure. Could you pls show me the GS data and latch signal waveform? Could you change the brightness by changing GS data of the LED you want?

BR, Gracie