Linux/DS90UB940-Q1: ds90ub940-q1 connect ds90ub947-q1 problem

user4823313

Part Number: DS90UB940-Q1
Other Parts Discussed in Thread: DS90UB947-Q1,

Tool/software: Linux

Hello, I bought the ds90ub947-q1 and ds90ub940-q1 evm connection. The pass lock light on the 940 side is bright. But read the 940 register 0x02=0x00. Seen from the 940 manual, 0x02 should be 0x80. Why?

Looking forward to reply, thank you

over 6 years ago

0 Steven(Shenzhen) Shi over 6 years ago

TI__Mastermind 30515 points

how about the other reg.? do you read it in ub940 side?

regards,

Steven

0 user4823313 over 6 years ago

Prodigy 230 points

No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 58 04 00 f0 fe 1e 00 28 00 00 00 00 00 00 00 00 X?.???.(........
10: 00 00 00 00 00 00 00 00 00 01 00 00 23 40 00 00 .........?..#@..
20: 00 00 40 30 08 00 83 84 01 00 00 00 00 00 00 00 ..@0?.???.......
30: 00 00 90 25 01 00 00 aa 00 00 00 00 20 e0 23 00 ..?%?..?.... ?#.
40: 43 03 03 00 60 88 00 00 0f 00 00 08 00 00 63 00 C??.`?..?..?..c.
50: 03 10 00 01 80 00 00 00 00 7f 20 20 00 00 00 00 ??.??....? ....
60: 00 00 00 00 10 00 00 00 00 00 00 00 00 03 00 00 ....?........?..
70: 00 00 00 07 07 08 00 00 00 00 00 00 02 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 0d 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 00 00 00 00 00 00 c0 00 00 00 00 00 00 00 ........?.......
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f0: 5f 55 42 39 34 30 00 00 00 00 00 00 00 00 00 00 _UB940..........

0 Steven(Shenzhen) Shi over 6 years ago in reply to user4823313

TI__Mastermind 30515 points

0x02[7] is "output enable" which is read/write reg. what is the result after the power on without any setting? the default of 0x02[7] is 1b'1.

regards,

Steven

0 user4823313 over 6 years ago in reply to Steven(Shenzhen) Shi

Prodigy 230 points

No register operation after power-on 0x02[7] is 0.
pass H
lock H
What could be the case

0 Steven(Shenzhen) Shi over 6 years ago in reply to user4823313

TI__Mastermind 30515 points

how many boards have this issue?

Steven

0 user4823313 over 6 years ago in reply to Steven(Shenzhen) Shi

Prodigy 230 points

This is the case with our own board and the TI evm board.
The project is very urgent and has been stopped here for a long time. Please help me.
regards