Table 9: I2C0 Port Expander TCA6416A U15 Connections (cont'd)
TCA6416A U15
Schematic Net
Name
Connected To
Pin Name
Pin Name
Ref. Designator
Device
P05
IIC_MUX_RESET_B
RESET_B
U20
TCA9548A
P06
GEN3_EXP_RESET_B
B
U34
SN74LVC1G08
P07
MAX6643_FULL_SPEED
FULLSPD
U50
MAX6643
P10
FMCP_HSPC_PRSNT_M
2C_B
PRSNT_M2C_L
J28(H)
ASP_184329_01
PRSNT_M2C_L
J28(N)
ASP_184329_01
P13
VCCINT_VRHOT_B
VRHOT_ICRIT#
U104
IR35215
P15
8A34001_EXP_RST_B
A
U415
SN74LVC1G08
P16
IRPS5401_ALERT_B
SM_ALERT#
U104
IR35215
ALERT_B
U53, U55
IRPS5401
SALERT#
U112, U123, U127
IR38164
P17
INA226_PMBUS_ALERT
ALERT
U57, U58, U59,U60,
U61, U62, U63, U64,
U65, U67, U71, U75,
U77, U124
INA226
The addresses of each target device on the I2C0 U17 PCA9544A switch are identified in the
following table.
Table 10: I2C0 Multiplexer PCA9544A U17 Target Device Addresses
PCA9544A U17 (Addr 0x75) Port
I2C0 Bus Device
Target Device Address
0
INA226_PMBus (Power Monitors)
0X40-0x43, 0x45-0x4E
1
Not Connected
N/A
2
IRPS5401_PMBus (Voltage Regulators)
0X40, 0x43, 0x44, 0x45, 0x4B, 0x4C
3
SYSMON U1 bank 65
0X32
I2C1 (MIO 16-17)
, callout 18]
I2C bus I2C1 connects RFSoC U1 PS Bank 500, PL bank 89, and system controller U38 to two
I2C switches (TCA9548A U20 and U22). These I2C1 connections enable I2C communications
with various I2C capable target devices. TCA9548A U20 is pin-strapped to respond to I2C
address
0x74
. TCA9548A U22 is pin-strapped to respond to I2C address
0x75
.
The following figure shows a high-level view of the I2C1 bus connectivity.
Chapter 3: Board Component Descriptions
UG1532 (v1.0) March 30, 2022
ZCU670 Board User Guide
31