VCU118 Board User Guide 83
UG1224 (v1.5) March 15, 2023
Chapter3: Board Component Descriptions
User applications that communicate with devices on one of the downstream I
2
C buses must
first set up a path to the desired target bus through the U28 or U80 bus switch at I
2
C
address 0x74 (0b1110100) or 0x75 (0b111101), respectively. Table 3-27 lists the address
for each bus.
Information about the TCA9548 is available on the TI Semiconductor website [Ref 25].
Table3‐27 : I
2
C Bus Addresses
I
2
C Devices
I
2
C
Switch
Position
I
2
C Address
Device
Binary Format Hex Format
TCA9548 8-Channel bus switch N/A 0b1110100 0x74 U28 TCA9548
SI570_1 clock 0 0b1011101 0x5D U32 SI570
Not used 1 N/A N/A N/A
QSFP1 module 2 0b1010000 0x50 U145 28 Gb/s QSFP+
QSFP2 module 3 0b1010000 0x50 U123 28 Gb/s QSFP+
SI5328 clock 4 0b1101000 0x68 U57 SI5328B
SI570_0 clock 5 0b1011101 0x5D U18 SI570
FPGA SYSMON 6 0b0110010 0x32 U1 BANK 65
FireFly Connector 7 0b1010000 0x50 J6 UEC5, UCC8
TCA9548 8-Channel bus switch N/A 0b1110101 0x75 U80 TCA9548
PMBus regulators 0
0b0010001-
0b0011011,
0b1110000-
0b1110011
0x11-0x1B,
0x70-0x73
Various Maxim
Regulators.MAX15301:U4,U6,U9,
U30,U150,U156;
MAX20751EKX: U164,U165,U166
FMCP HSPC (FMC Plus) 1 0bXXXXXXX 0x## J22 FMCP HSPC
FMC HPC1 2 0bXXXXXXX 0x## J2 FMC HPC
I
2
C EEPROM 3 0b1010100 0x54 U12 M24C08
PMBus INA226AIDGS power
monitor
4
0b1000000-
0b1001000
0x40-0x48 U8,U23,U27,U29,U35,U36,U37
SI570_2 clock 5 0b1011101 0x5D U38 SI570
Not used 6 N/A N/A N/A
Not used 7 N/A N/A N/A
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