How to configure DS64BR111 by using SMbus?

Yongzhen Chen

Other Parts Discussed in Thread: DS64BR111

Hi,

We use several DS64BR111 chips in our system to re-drive the QSGMII signals, which should run at 5Gbps.

When we use pin MODE, the system can work. But when we use the I2C to control the system, the system can not work.

We use a MCU to control the DS64BR111. The MCU can read and write the registers of DS64BR111, but the registers look like can not control the chip. Such as we modify the register with the address of 0x23 to control the output swing, but we can not observe the change of the swing.

Please help us. Thanks!

Regards

Chen Yongzhen (DSI)

over 10 years ago

0 Raja over 10 years ago

TI__Guru* 81335 points

Hi Chen,

Welcome to the TI E2E forum. I hope you will find many good answers here and in the TI.com documents and in the TI Wiki Pages (for processor issues). Be sure to search those for helpful information and to browse for the questions others may have asked on similar topics (e2e.ti.com).

Moving this thread over high speed interface forum for appropriate response. Thank you for your patience.

0 Michael Lu (Santa Clara) over 10 years ago

TI__Mastermind 29655 points

Hi Chen,

It sounds like you may not have set the CRC Disable bit on Reg 0x06[3]. By setting this bit to 1, you will be able to make changes to repeater settings such as output voltage swing and see an immediate effect on the IC.

Thanks,

Michael

Interface

Interface forum

How to configure DS64BR111 by using SMbus?