SFP28 Module Connectors

ZCU111 Evaluation Board User Guide (UG1271)

Document ID
UG1271
Release Date
2022-10-06
Revision
1.3 English

[This Figure, callouts 14, 15]

The ZCU111 board hosts four SFP28 connectors J27, J32, J37, and J42. The connectors are housed within a single quad SFP28 cage assembly. The ganged SFP28 cage supports up to four SFP/SFP+/SFP28 modules. This Figure shows the SFP28 module connector circuitry typical of the four implementations.

Note:   The SFPx_TX_DISABLE default 2-pin jumper is On, which means the SFPx_TX_DISABLE net is pulled Low, enabling the TX output of the SFP module.

Figure 3-23:      SFP28 Module Connectivity

X-Ref Target - Figure 3-23

X20491-zsfp-zsfp+-module.jpg

Table: SFP28 Control and Status Board Test Points lists the SFP28 module connections to RFSoC U1.

Table 3-21:      SFP28 Control and Status Board Test Points

SFP28 Control/
Status Signal

Board Connection

SFP0 J27(1)(2)

SFP_TX_FAULT

Test point J28

High = Fault

Low = Normal operation

SFP_TX_DISABLE

Jumper J29

Off = SFP disabled

On = SFP enabled

SFP_MOD_DETECT

Test point J30

High = Module not present

Low = Module present

SFP_RS0

PU R276/PD R278

PU R276 = Full RX bandwidth

PD R278 = Reduced RX bandwidth

SFP_RS1

PU R277/PD R279

PU R277 = Full TX bandwidth

PD R279 = Reduced TX bandwidth

SFP_LOS

Test point J31

High = Loss of receiver signal

Low = Normal operation

SFP1 J32(1)(2)

SFP_TX_FAULT

Test point J33

High = Fault

Low = Normal operation

SFP_TX_DISABLE

Jumper J35

Off = SFP disabled

On = SFP enabled

SFP_MOD_DETECT

Test point J34

High = Module not present

Low = Module present

SFP_RS0

PU R281/PD R283

PU R281 = Full RX bandwidth

PD R283 = Reduced RX bandwidth

SFP_RS1

PU R282/PD R284

PU R282 = Full TX bandwidth

PD R284 = Reduced TX bandwidth

SFP_LOS

Test point J36

High = Loss of receiver signal

Low = Normal operation

SFP2 J37(1)(2)

SFP_TX_FAULT

Test point J38

High = Fault

Low = Normal operation

SFP_TX_DISABLE

Jumper J40

Off = SFP disabled

On = SFP enabled

SFP_MOD_DETECT

Test point J39

High = Module not present

Low = Module present

SFP_RS0

PU R289/PD R291

PU R289 = Full RX bandwidth

PD R291 = Reduced RX bandwidth

SFP_RS1

PU R290/PD R292

PU R290 = Full TX bandwidth

PD R292 = Reduced TX bandwidth

SFP_LOS

Test point J41

High = Loss of receiver signal

Low = Normal operation

SFP3 J42(1)(2)

SFP_TX_FAULT

Test point J43

High = Fault

Low = Normal operation

SFP_TX_DISABLE

Jumper J44

Off = SFP disabled

On = SFP enabled

SFP_MOD_DETECT

Test point J45

High = Module not present

Low = Module present

SFP_RS0

PU R294/PD R300

PU R294 = Full RX bandwidth

PD R300 = Reduced RX bandwidth

SFP_RS1

PU R295/PD R301

PU R295 = Full TX bandwidth

PD R301 = Reduced TX bandwidth

SFP_LOS

Test point J46

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 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 [Ref 28].

Table: SFP28 RFSoC Connections lists the SFP28 module connections to the Zynq UltraScale+ RFSoC U1.

Table 3-22:      SFP28 RFSoC Connections

XCZU28DR Pin (U1)  

 Schematic Net Name  

I/O Standard

 SFP+ Pin  

SFP+ Pin Name

SFP0 J27

Y35

 SFP0_TX_P

(1)

18

 TD_P

Y36

 SFP0_TX_N

(1)

19

 TD_N

AA38

 SFP0_RX_P  

(1)

13

 RD_P

AA39

SFP0_RX_N

(1)

12

 RD_N  

G12

SFP0_TX_DISABLE_B

LVCMOS12

3

 TX_DISABLE  

SFP1 J32

V35

 SFP1_TX_P

(1)

18

 TD_P

V36

 SFP1_TX_N

(1)

19

 TD_N

W38

 SFP1_RX_P  

(1)

13

 RD_P

W39

SFP1_RX_N

(1)

12

 RD_N  

G10

SFP0_TX_DISABLE_B

LVCMOS12

3

 TX_DISABLE  

SFP2 J37

T35

 SFP2_TX_P

(1)

18

 TD_P

T36

 SFP2_TX_N

(1)

19

 TD_N

U38

 SFP2_RX_P  

(1)

13

 RD_P

U39

SFP2_RX_N

(1)

12

 RD_N  

K12

SFP0_TX_DISABLE_B

LVCMOS12

3

 TX_DISABLE  

SFP3 J42

R33

 SFP3_TX_P

(1)

18

 TD_P

R34

 SFP3_TX_N

(1)

19

 TD_N

R38

 SFP3_RX_P  

(1)

13

 RD_P

R39

SFP3_RX_N

(1)

12

 RD_N  

J7

SFP0_TX_DISABLE_B

LVCMOS12

3

 TX_DISABLE  

Notes:

1.Bank 128 GTY connections, I/O standards not applicable.

For additional information about the small form factor pluggable SFP28 module, see the SFF-8402 and SFF-8432 specifications at the SNIA Technology Affiliates website [Ref 28].