thanks for your help.
I have add the 3 clock inside the latch pulse, but there is not a big difference.
I have now half of all display light on. 1 ligne on and the next off, I don’t use the ABC ligne correcly i think.
I don’t understand the use of these 3 ligne ABC because that give 8 cs posibilities and not 32 like the 1/32 scan write on the silk screen of the led module.
I have take off the plastic protection of the module to look where is connected the ABC ligne,
ABC ligne are connected to 8 RT5957SP, ligne A and B are common for all of the 8 RT5957SP and the C ligne si juste conected to the firts, the 8 RT5957 are chained (like a shift register) but I don’t yet find the datasheet of the RT5957SP, this is 16 pin componant
- Ligne A is connected (via a buffer 74HC245) to the pin 3 of the 8 RT5957SP
- Ligne B is connected (via a buffer 74HC245) to the pin 4 of the 8 RT5957SP
- Ligne C is connected (via a buffer 74HC245) to the pin 2 of the 1st RT5957SP
the 1st RT5957SP has pin 10 connected to the pin 2 of the second RT5957SP …
Pin 1 and 11 connected to VCC
Pin 9 connected to GND.
I have found the datashett of this componant on Raffar Technology
the datasheet is in chinis but with google traduction that is understanding
But There is no explication about the timing, I have send a email of the productor and I hope to receive a response.