DS90UB954-Q1: I2C remote access from 954 to 933

Expert 3040 points

Part Number: DS90UB954-Q1

Hi team,

Customer would like to know how 954 (host side) control remote 933, would you let me know the following case?

1) What's the setting on 954 to enable GPO[2]/CLKOUT on 933?

2) What's the setting on 954 to control GPO[1], which is connected to RESET of ISP?

Regards, NY

over 7 years ago

0 Hamzeh Jaradat over 7 years ago

TI__Guru** 108090 points

Hello,

1) If you are using external clock on the 933, GPO2 will be functioning as CLKOUT without changing any settings. In this case you can't use GPO2 as output for input signal from the 954.
2) it depends how you want to use GPO1, as input or as output?

0 NY over 7 years ago in reply to Hamzeh Jaradat

TI__Expert 3040 points

Hi Hamzeh,

Thank you very much for your answers,
For #2), they would like to use as output, how should they contorl from 954?

0 NY over 7 years ago in reply to NY

TI__Expert 3040 points

Hi Hamzeh,

would you answer on #2?
regards, ny

0 Liam Keese over 7 years ago in reply to NY

TI__Genius 12705 points

Hello,
To control the GPO1 as output on the 933 from the 954 there are two options.
1.You can program 933 GPO2 directly over backchannel using 933 register 0x0D[7:6] = 10
2. configure the 954 to link GPIO input to the 933 GPO1 output over the backchannel. This configuration is done in register 0x6E and 0x6F of the DS90UB954.

Regards,

0 NY over 7 years ago in reply to Liam Keese

TI__Expert 3040 points

Hi Liam,

Thank you very much I understand. regards ny

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DS90UB954-Q1: I2C remote access from 954 to 933