Xilinx ZCU111 User Manual page 62

Table 3-21: SFP28 Control and Status Board Test Points (Cont'd)
SFP28 Control/
Status Signal
SFP_MOD_DETECT
SFP_RS0
SFP_RS1
SFP_LOS
SFP_TX_FAULT
SFP_TX_DISABLE
SFP_MOD_DETECT
SFP_RS0
SFP_RS1
SFP_LOS
Notes:
1. The RS0/RS1 PU/PD resistors are not populated.There are pull-down resistors built into the SFP28 modules that
select the lower bandwidth mode of the module.
2. BW selection is also available via I2C control. For this and additional information about the SFP28 module, see
SFF-8402 and SFF-8432 at the specification website
ZCU111 Board User Guide
UG1271 (v1.1) August 6, 2018
Chapter 3: Board Component Descriptions
Board Connection
Test point J39
PU R289/PD R291
PU R290/PD R292
Test point J41
(1)(2)
SFP3 J42
Test point J43
Jumper J44
Test point J45
PU R294/PD R300
PU R295/PD R301
Test point J46
[Ref 28].
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High = Module not present
Low = Module present
PU R289 = Full RX bandwidth
PD R291 = Reduced RX bandwidth
PU R290 = Full TX bandwidth
PD R292 = Reduced TX bandwidth
High = Loss of receiver signal
Low = Normal operation
High = Fault
Low = Normal operation
Off = SFP disabled
On = SFP enabled
High = Module not present
Low = Module present
PU R294 = Full RX bandwidth
PD R300 = Reduced RX bandwidth
PU R295 = Full TX bandwidth
PD R301 = Reduced TX bandwidth
High = Loss of receiver signal
Low = Normal operation
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