QSFP28 Connections to Transceiver Banks 67 and 69
The following table lists the QSFP28 module level-shifted control signal connections to
XCVU37P FPGA U1 bank 67 (QSFP1, QSFP4) and bank 69 (QSFP2, QSFP3).
Table 26: XCVU37P U1 to QSFP28 Module Control and I2C Connections
FPGA (U1) Pin
Schematic Net
FPGA (U1)
Direction
Module Pin Num Module Pin Name
QSFP1 J42 (U1 bank 67)
BM24
QSFP1_MODSKLL_LS
Output
8
MODSELL
BN25
QSFP1_RESETL_LS
Output
9
RESETL
BM25
QSFP1_MODPRSL_LS
Output
27
MODPRSL
BP24
QSFP1_INTL_LS
Input
28
INTL
BN24
QSFP1_LPMODE_LS
Output
31
LPMODE
U54.13
QSFP1_I2C_SDA
BiDir
12
SDA
U54.14
QSFP1_I2C_SCL
Output
11
SCL
QSFP2 J39 (U1 bank 69)
BN5
QSFP2_MODSKLL_LS
Output
8
MODSELL
BN6
QSFP2_RESETL_LS
Output
9
RESETL
BN7
QSFP2_MODPRSL_LS
Output
27
MODPRSL
BP6
QSFP2_INTL_LS
Input
28
INTL
BP7
QSFP2_LPMODE_LS
Output
31
LPMODE
U54.15
QSFP2_I2C_SDA
BiDir
12
SDA
U54.16
QSFP2_I2C_SCL
Output
11
SCL
QSFP3 J35 (U1 bank 69)
BM5
QSFP3_MODSKLL_LS
Output
8
MODSELL
BL6
QSFP3_RESETL_LS
Output
9
RESETL
BM7
QSFP3_MODPRSL_LS
Output
27
MODPRSL
BL7
QSFP3_INTL_LS
Input
28
INTL
BN4
QSFP3_LPMODE_LS
Output
31
LPMODE
U54.17
QSFP3_I2C_SDA
BiDir
12
SDA
U54.18
QSFP3_I2C_SCL
Output
11
SCL
QSFP4 J32 (U1 bank 67)
BK23
QSFP4_MODSKLL_LS
Output
8
MODSELL
BK24
QSFP4_RESETL_LS
Output
9
RESETL
BL22
QSFP4_MODPRSL_LS
Output
27
MODPRSL
BH21
QSFP4_INTL_LS
Input
28
INTL
BH21
QSFP4_LPMODE_LS
Output
31
LPMODE
U54.19
QSFP4_I2C_SDA
BiDir
12
SDA
Chapter 3: Board Component Descriptions
UG1302 (v1.1) April 21, 2021
VCU128 Board User Guide
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