Xilinx Zynq UltraScale+ ZCU208 - Page 48

Table 19: zSFP Control and Status Board Connections (cont'd)
zSFP Control/ Status Signal Board Connection
SFP_RS0 PU R270 / PD R273 PU R270 = Full RX bandwidth
PD R273 = Reduced RX bandwidth
SFP_RS1 PU R271 / PD R274 PU R271 = Full TX bandwidth
PD R274 = Reduced TX bandwidth
SFP_LOS Test Point TP16 High = Loss of receiver signal
Low = Normal operation
SFP2 J29 RT
1, 2
SFP_TX_FAULT Test Point TP5 High = Fault
Low = Normal Operation
SFP_TX_DISABLE Jumper J32
Switch Q4 U1.K14
Off = SFP Disabled
On = SFP Enabled
SFP_MOD_DETECT Test Point TP6 High = Module not present
Low = Module Present
SFP_RS0 PU R279 / PD R281 PU R279 = Full RX bandwidth
PD R281 = Reduced RX bandwidth
SFP_RS1 PU R280 / PD R282 PU R280 = Full TX bandwidth
PD R282 = Reduced TX bandwidth
SFP_LOS Test Point TP7 High = Loss of receiver signal
Low = Normal operation
SFP3 J29 RL
1, 2
SFP_TX_FAULT Test Point TP8 High = Fault
Low = Normal Operation
SFP_TX_DISABLE Jumper J35
Switch Q5 U1.K15
Off = SFP Disabled
On = SFP Enabled
SFP_MOD_DETECT Test Point TP9 High = Module not present
Low = Module Present
SFP_RS0 PU R284 / PD R290 PU R284 = Full RX bandwidth
PD R290 = Reduced RX bandwidth
SFP_RS1 PU R285 / PD R291 PU R285 = Full TX bandwidth
PD R291 = Reduced TX bandwidth
SFP_LOS Test Point TP10 High = Loss of receiver signal
Low = Normal operation
Notes:
1. The RS0/RS1 PU/PD resistors are not populated. There are pull-down resistors built into the zSFP modules that select
the lower bandwidth mode of the module.
2. BW selection is also available through I2C control.
For addional informaon about the zSFP module, see SFF-8402 and SFF-8432 on the SNIA
Technology Aliates website.
Chapter 3: Board Component Descriptions
UG1410 (v1.0) July 8, 2020 www.xilinx.com
ZCU208 Board User Guide 48
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