zSFP/zSFP+ Module Connector

VMK180 Evaluation Board User Guide (UG1411)

Document ID

UG1411

Release Date

2024-09-13

Revision

1.3 English

[Figure 1, callout 13]

The VMK180 board hosts dual-port zSFP/zSFP+ J287, which accepts zSFP or zSFP+ modules. The following figure shows the zSFP/zSFP+ module connector circuitry typical of the two implementations.

Figure 1. zSFP/zSFP+ Module Connector

The following table lists the zSFP+ module control and status connections.

Table 1. zSFP0- zSFP1 Module Control and Status Connections
zSFP Control/Status Signal	Board Connection		zSFP Module
SFP0_TX_FAULT	Test point J276	High = Fault	zSFP0 J287 lower
SFP0_TX_FAULT	Test point J276	Low = Normal operation
SFP0_TX_DISABLE	Jumper J35	Off = SFP disabled
SFP0_TX_DISABLE	Jumper J35	On = SFP enabled
SFP0_MOD_DETECT	Test point J31	High = Module not present
SFP0_MOD_DETECT	Test point J31	Low = Module present
SFP0_RS0¹	PU R1420/PD R1426	PU R25 = Full RX bandwidth
SFP0_RS0¹	PU R1420/PD R1426	PD R30 = Reduced RX bandwidth
SFP0_RS1¹	PU R1421/PD R1427	PU R227 = Full RX bandwidth
SFP0_RS1¹	PU R1421/PD R1427	PD R142 = Reduced RX bandwidth
SFP0_LOS	Test point J33	High = Loss of receiver signal
SFP0_LOS	Test point J33	Low = Normal operation

SFP1_TX_FAULT	Test point J30	High = Fault	zSFP1 J287 upper
SFP1_TX_FAULT	Test point J30	Low = Normal operation
SFP1_TX_DISABLE	Jumper J32	Off = SFP disabled
SFP1_TX_DISABLE	Jumper J32	On = SFP enabled
SFP1_MOD_DETECT	Test point J277	High = Module not present
SFP1_MOD_DETECT	Test point J277	Low = Module present
SFP1_RS0¹	PU R1428/PD R1431	PU R182 = Full RX bandwidth
SFP1_RS0¹	PU R1428/PD R1431	PD R190 = Reduced RX bandwidth
SFP1_RS1¹	PU R1429/PD R1432	PU R185 = Full RX bandwidth
SFP1_RS1¹	PU R1429/PD R1432	PD R202 = Reduced RX bandwidth
SFP1_LOS	Test point J278	High = Loss of receiver signal
SFP1_LOS	Test point J278	Low = Normal operation
The RS0/RS1 PU/PD resistors are not populated. There are pull-down resistors built into the SFP/zSFP modules that select the lower bandwidth mode of the module.

For additional information about the enhanced SFP+ module, see the SFF-8431 specification at the SNIA website.

The zSFP connector I2C interfaces are connected to the I2C bus via the TCA9548 I2C multiplexer U214 (see PMC MIO[46:47] I2C0 Bus and PMC MIO[44:45] I2C1 Bus for more details).

The detailed Versal adaptive SoC connections for the feature described in this section are documented in the VMK180 board XDC file, referenced in Xilinx Design Constraints.