DS125DF111: DS125DF111 Loopback setting

ByungJun kim

Part Number: DS125DF111

If I change the value of register 0x07 : 0x03'h in the control/shared register set, I think it will work as loopback. Is that right?

0xff 0x00 Select control/shared Register

0x07 0x03 input A --> Output B and input B --> output A

I want to set it up as above.
Even if both port A and port B are looped back and the bypass mode is executed, it does not loop back.

Can the DS125DF111 operate as shown in the picture above?
What settings should I set if I can?

10 months ago

0 Lucas Wolter 10 months ago

TI__Mastermind 23725 points

Hi,

That's correct, writing shared register 0x07=0x03 should loopback INA --> OUTB and INB --> OUTA.

ByungJun kim said:
Even if both port A and port B are looped back and the bypass mode is executed, it does not loop back.

Can you confirm the ENSMB pin is pulled high for SMBus slave mode? Can you share your full register write sequence?

Best,

Lucas

0 ByungJun kim 10 months ago in reply to Lucas Wolter

Prodigy 10 points

Thank you very much for your response.

The SMBUS is connected to High.
I'm using it in slave mode.

It was confirmed that the bypass mode operation operates normally.

I'm trying to use both channel A and channel B as Loopback, but it doesn't work.

Register Address	Write Value
FF	00
07	03
FF	0C
09	00
1E	08
2D	88
03	00
0A	IC
WATE	1 SEC
0A	10

0 ByungJun kim 10 months ago in reply to Lucas Wolter

Prodigy 10 points

I solved the problem.

The link was not connected due to a polarity problem.

Changed the polarity of dirver.
This is how the problem was solved.

0 Lucas Wolter 10 months ago in reply to ByungJun kim

TI__Mastermind 23725 points

Hi ByungJun,

I'm glad you were able to resolve the issue! Thanks for following up and sharing your solution.

Best,

Lucas

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DS125DF111: DS125DF111 Loopback setting