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The following figure shows a high-level view of the I2C0 bus connectivity.
U1
BANK 500
PS I2C0
MIO15/
MIO14
U38
MPS430
P3_0
P3_1
The following table identifies the devices on each port of the I2C0 U15 TCA6416A port
expander.
Table 9: I2C0 Port Expander TCA6416A U15 Connections
TCA6416A U15
Pin Name
SDA
SCL
P00
P01
P02
P03
P04
UG1532 (v1.0) March 30, 2022
ZCU670 Board User Guide
Figure 8: I2C0 Bus Topology
U13
I2C0_SDA/SCL
L/S
Schematic Net
Name
Pin Name
I2C0_SDA
I2C0_SCL
MAX6643_OT_B
MAX6643_FANFAIL_B
MIO26_PMU_INPUT_LS
DAC_AVTT_VOUT_SEL
SI5381_INT_ALM
Chapter 3: Board Component Descriptions
U15
TCA6416A
SDA/
SCL
0x20
U17
PCA9544A
SD0/SC0
SD1/SC1
SDA/
SCL
SD2/SC2
SD3/SC3
0x75
Connected To
Ref. Designator
Refer to connections shown in the figure above.
TCA6416A U15 Addr. 0x20
OT_B
U50
FANFAIL_B
U50
PS_MIO26
U1
G
Q36
INTRB
U43
Send Feedback
MAX6643_OT_B
P00
MAX6643_FANFAIL_B
P01
MI026_PMU_INPUT_LS
P02
DAC_AVTT_VOUT_SEL
P03
SI5381_INT_ALM
P04
IIC_MUX_RESET_B
P05
GEM3_EXP_RESET_B
P06
MAX6643_FULL_SPEED
P07
FMC_HSPC_PRSNT_M2C_B
P10
CLK_SPI_MUX_SEL0
P11
CLK_SPI_MUX_SEL1
P12
IRPS5401_ALERT_B
P16
INA226_PMBUS_ALERT
P17
INA226_PMBUS_SCA/SCL
Not Connected
IRPS5401_PMBUS_SDA/SCL
SYSMON_SCA/SCL
X25699-090321
Device
MAX6643
MAX6643
XCZU67DR
NDS331N
SI5381A
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