[Figure 1, callout 12]
Bus I2C0 connects the XCVP1202 U1 PS bank 501 and the XCZU4EG system
controller U125 PS bank 501 to a GPIO 16-bit port expander (TCA6416A U233) and I2C
switch (TCA9548A U33). The port expander enables accepting various fan controller,
FMCP connector, and power system status inputs. Bus I2C0 also provides access to
power system PMBus power controllers and INA226 power monitors, as well as three
SI570 components via the U33 TCA9548A switch. TCA6416A U233 is pin-strapped to
respond to I2C address
0x20. The TCA9548A U33
switch is set to
0x74. Details for controlling the
U33 TCA9548A switch can be located in the data sheet located on the Texas
The detailed ACAP connections for the feature described in this section are documented in the VPK120 board XDC file, referenced in Xilinx Design Constraints.
The following figure shows the I2C0 bus connectivity.
The devices on each port of the I2C0 U233 TCA6416A port expander and on each bus of the I2C0 U33 TCA9548A switch are listed in the following tables.
|PMBUS2_INA226_ALERT||P04||In||U125 (ZU4), U166, U168, U172, U174, U176, U177, U184, U186, U188, U234, U260, U264, U265|
|FMCP1_FMC_PRSNT_M2C_B||P10||In||J51 FMCP HSPC|
|FMCP1_FMCP_PRSNT_M2C_B||P12||In||J51 FMCP HSPC|
|PMBUS_ALERT||P16||In||U13, U125 (ZU4), U152, U160, U167, U175, U185, U187, U189, U259|
|PMBUS1_INA226_ALERT||P17||In||U5 ,U65, U125 (ZU4), U161, U163,U164, U165|
|I2C Devices||I2C Switch Pos.||I2C Address||Devices|
|PMBUS_SDA/SCL||0||See Board Power System|
|PMBUS1_INA226_SDA/SCL||1||See Board Power System|
|PMBUS2_INA226_SDA/SCL||3||See Board Power System|