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DS125BR401A: PCIE Redriver DS125BR401 Schematic review and i2c 7bit

Jim Tsan
Prodigy 115 points
Part Number: DS125BR401A


Hi Sir:

DS125BR401A.pdf

          We had used two DS125BR401A for PCIe Gen 3. i like wnat to used Daisy-chain way to load code  from external eeprom, please check Schematic and espcially i2c address and eeprom address.

another , we're setting i2c adddress 0xb2, is this 7bit i2c address? thanks. 

  • 0
    TI__Mastermind 43795 points

    Hi,

    The schematic looks okay.  I would ensure that there are pull-ups to 3.3V on SCL and SDA.

    The address lines in the schematic are mostly unconnected.  For address 0xB0 AD[3:0] should all be tied to GND.  For 0xB2 AD[3:1] should be tied to GND and AD[0] should be tied to 3.3V.

    The I2C addresses 0xB0 and 0xB2 are 8-bit addresses.

    The 7-bit equivalent addresses are 0x58 and 0x59

    Regards,

    Lee