The zSFP+ control signals can be asserted in multiple ways. The zSFP+ has an I2C connection to the I2C0 bus through the I2C multiplexer (TCA9548PWR U33) as shown in the PMC MIO[46:47] I2C0 Bus section.
The following table lists the transceiver module control signals.
Signal Name | Feature | Notes | Schematic Page |
---|---|---|---|
SFP_SDA | Two-wire interface data | U33 I2C MUX | 29, 39 |
SFP_SCL | Two-wire interface clock | U33 I2C MUX | 29, 39 |
SFP_TX_FAULT | Module to U1 - fault condition detected | U1 Bank 401 | 6, 29 |
SFP_TX_DISABLE | U1 to module - transmitter disable | U233 I2C GPIO expander | 29, 39 |
SFP_MOD_ABS | Logic High when module absent | U233 I2C GPIO expander | 29, 39 |
SFP_RX_LOS | Module to U1 - RX signal loss | U1 Bank 401 | 6, 29 |