Xilinx KCU116 User Manual page 56

User applications that communicate with devices on one of the downstream I
first set up a path to the desired target bus through the U34 or U135 bus switch at I
address 0x74 (0b1110100) or 0x75 (0b111101), respectively. The TCA6416A address is
0x21 and the I/O expander powers up in input mode.
bus and the I2C address of the TCA9548 U34 and U135 bus switch target devices.
Table 3‐18: I2C Bus Addresses
I2C Bus
TCA9548 8-Channel bus switch (U34)
EEPROM_IIC_SDA/SCL
Not Used
Not Used
USER_MGT_SI570_CLOCK_SDA/SCL
Si5328_SDA/SCL
PL_PMBUS_SDA/SCL (INA226)
Not Used
Not Used
TCA9548 8-Channel bus switch (U135)
FMC_HPC0_IIC_SDA/SCL
MAXIM_PMBUS_SDA/SCL
Not Used
Not Used
SFP3_IIC_SDA/SCL
SFP2_IIC_SDA/SCL
SFP1_IIC_SDA/SCL
SFP0_IIC_SDA/SCL
2
TCA6416 I C Port Expander
Information about the PCA9548A and TCA6416A is available on the TI Semiconductor
website [Ref 31].
KCU116 Board User Guide
UG1239 (v1.2) September 28, 2018
I2C Switch
Position
Binary Format
N/A
0b1110100
0
0b1010000
1 N/A
2 N/A
3
0b1011101
4
0b1101000
0b1000000-
5
0b1000111,
0b1001011
6 N/A
7 N/A
N/A
0b1110101
0
0bXXXXXXX
0b0010010-
0b0011010,
1
0b1110010-
0b1110011
2 N/A
3 N/A
4
0b1010000
5
0b1010000
6
0b1010000
7
0b1010000
N/A
0b0100001
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Chapter 3: Board Component Descriptions
Table 3-18 lists the address for each
I2C Address
Hex Format
0x74
0x50
N/A
N/A
0x5D
0x68
0x40-0x47, 0x4B
N/A
N/A
0x75
0xXX
0x12-0x1A,
0x72-0x73
N/A
N/A
x50
x50
x50
x50
0x21
Send Feedback
2
C buses must
2
C
Device
U34 TCA9548
U12 M24C08
N/A
N/A
U32 SI570
U57 SI5328C
INA226
N/A
N/A
U135 TCA9548
J5 FMC HPC0
MAX15301/3,
MAX20751
N/A
N/A
J6 SFP3
J4 SFP2
J3 SFP1
J1 SFP0
U147 TCA6416
56