Other Parts Discussed in Thread: ISO1540,
Tool/software:
Hi Team,
I would like to implement the SMBus isolator(ISO1540DR) and SMBus buffer(TCA9617ADGKR) in my NIC3.0 card.
1. For the SMBus isolator , it is required in OCP NIC3.0 release standard as below description.
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For OCP NIC 3.0 cards, the SMCLK/SMDAT from the endpoint silicon and FRU EEPROM shall be connected to the card edge gold fingers. SMCLK[0:1] is on the +3.3V_EDGE power domain. Isolation logic may be required for the target silicon device(s) to prevent a leakage path. The SMBus isolation logic shall be enabled by the local card indication of “Aux Power Good.” Refer to Figure 106 for an example topology and isolation logic.
2. We would like to reserve the SMBus buffer for there's the long cable path connection to Main board.
Would you please help to review our design ?
If you have any suggestion, please let me know.
Schematic :
