Xilinx KCU116 - Page 56

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