Part Number: DS90UB924-Q1
Hi Team,
My customer now use DS90UB947 and DS90UB924. And meet an issue.
1. There is no video output when power-up occasionally,
2. The test found that the LVDS signal output by SOC to 947 is normal
3.924 output LVDS CLK signal (CLK=51.2MHz) is normal, but 924 output LVDS data only has a bias voltage of 1.2V and no data signal at all.
4. All GPIO work normally. GPIO 0-3 could pass through normally.
As for 947, the registers are no difference between 924 has LVDS data output and has no LVDS data output.
As for 924,
0X2B: When 924 has LVDS data output, 0x2B = a8; when 924 has no LVDS data output, 0x2B = a0. This register is not introduced in the manual, and we cannot modify it. It is assumed to be a read-only register
0X5F: When 924 has LVDS data output, 0x5F = 32; when 924 has no LVDS data output, 0x5F = 33. The register is marked as a read-only register, but it does not explain the meaning of each bit.
Could you please kindly give some advice?
