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我司在调式940与947时遇到在BIST模式下 ,940芯片PASS LOCK 都为低的情况，具体操作手顺如下。
940端寄存器操作：1.0×34=0x02(PORT1_SEL)
2.0x1d=0x49(D_GPIO0 set H)
3.BISTEN set H
947端没有操作
请帮忙看一下哪里有问题 谢谢
user4823313：
补充一点 查到947寄存器0x0c[4]=0 看描述0为No CRC errors detected during BIST 可940端pass lock依然为L
user4823313：
回复 user4823313:
root@imx6dlwisehmi-hall:/# ./i2cdump.sh
No size specified (using byte-data access)0123456789abcdef0123456789abcdef
00: 20 80 00 d2 80 00 58 00 00 00 d0 89 07 20 00 00?.??.X…??? ..
10: 00 00 00 fa 00 00 fe 1e 7f 7f 09 00 00 00 01 00…?..?????…?.
20: 0b 00 25 00 00 00 00 00 01 20 20 a0 00 00 a5 5a?.%…..??..?Z
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
40: 14 55 00 00 80 00 63 00 00 00 00 00 00 00 00 c0?U..?.c……..?
50: 16 00 00 00 03 00 00 02 00 00 0d a0 02 06 44 2e?…?..?..????D.
60: 22 02 00 00 10 00 00 00 00 00 00 00 00 00 00 00"?..?………..
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
c0: 00 00 80 00 18 00 00 60 c0 00 00 00 00 00 ff 00..?.?..`?…….
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
e0: 00 00 80 00 08 38 00 00 00 00 00 00 00 00 00 00..?.?8……….
f0: 5f 55 42 39 34 37 00 00 00 00 00 00 00 00 00 00_UB947……….
dachao zhang：
回复 user4823313:
你看看是不是上电时序的问题
user4823313：
root@imx6dlwisehmi-hall:/# ./i2cdump.sh
No size specified (using byte-data access)0123456789abcdef0123456789abcdef
00: 20 80 00 d2 80 00 58 00 00 00 d0 89 07 20 00 00?.??.X…??? ..
10: 00 00 00 fa 00 00 fe 1e 7f 7f 09 00 00 00 01 00…?..?????…?.
20: 0b 00 25 00 00 00 00 00 01 20 20 a0 00 00 a5 5a?.%…..??..?Z
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
40: 14 55 00 00 80 00 63 00 00 00 00 00 00 00 00 c0?U..?.c……..?
50: 16 00 00 00 03 00 00 02 00 00 0d a0 02 06 44 2e?…?..?..????D.
60: 22 02 00 00 10 00 00 00 00 00 00 00 00 00 00 00"?..?………..
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
c0: 00 00 80 00 18 00 00 60 c0 00 00 00 00 00 ff 00..?.?..`?…….
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00…………….
e0: 00 00 80 00 08 38 00 00 00 00 00 00 00 00 00 00..?.?8……….
f0: 5f 55 42 39 34 37 00 00 00 00 00 00 00 00 00 00_UB947……….
user4823313：
回复 Kailyn Chen:
你好 Kailyn
940端BISTEN 为高 并0x24[3]=1 说明是由PIN控制
BISTC 我给的电压是低电压 为PCLK
940端0x25=0x00
947端0x1b=0x00
这样是否证明链路没问题了呢？
注：940端PASS、LOCK依然为低电
user4823313：
回复 Kailyn Chen:
hi kailyn chen
有没有ds90ub940 driver参考代码呢？
