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I2C0
U13
PS_I2C0
L/S
I2C0 (MIO 14-15)
[Figure
2, callout 17]
I2C bus I2C0 connects Zynq UltraScale+ RFSoC U1 PS Bank 500 and the system controller U38
to a GPIO 16-bit port expander (TCA6416A U15) and I2C switch (PCA9544A U17). The port
expander enables controlling resets and power system enable pins and accepts various alarm
inputs. The I2C0 bus also provides access to the PMBUS power controllers and INA226 power
monitors through the U17 PCA9544A switch. TCA6416A U15 is pin-strapped to respond to I2C
address 0x20. The PCA9544A U17 switch is set to 0x75.
UG1532 (v1.0) March 30, 2022
ZCU670 Board User Guide
Figure 7: I2C0 and I2C1 Bus Connectivity Overview
System Controller
P3
P4
U38 MSP430
Zynq UltraScale+
PS_I2C1
RFSoc PS-Side
RFSoC PL-Side
U1 XCZU67DR
0x20
0
MAX6643_OT_B
1
MAX6643_FF_B
P0
2
MIO26_PMU_IN
3
DAC_VOUT_SEL
SI5381_INT_ALM
4
IIC_MUX_RST_B
GPIO
5
GEM3_RST_B
Expander
6
MAX6643_FSPD
7
0
FMCP_PRSNT
P1
3
VINT_VRHOT_B
5
8A34001_RST_B
6
IRPS_ALERT_B
7
INA_ALERT_B
U15 TCA6416A
0x75
0
INA226 PMBus
1
N.C.
12C Mux
2
IRPS5401 (PS + PL Voltage Controller PMBus)
#3
3
SYSMON
U17 PCA9544A
Chapter 3: Board Component Descriptions
I2C1
0x74
12C
U18
Mux
L/S
U20 TCA9548A
0x75
12C
Mux
U22 TCA9548A
PMBus Cable
J21
Send Feedback
0
EEPROM
1
SI5381
2
USER_SI570_C0
3
USER_MGT_S1570
4
8A34001
5
CLK104
6
RFMC_2
7
N.C.
FMC+ HSPC
0
USER_SI50_PSREF
1
SYSMON (DNP resistors)
2
PS_DDR4_SODIMM
3
SFP3
4
SFP2
5
SFP1
6
SFP0
7
X25698-111521
www.xilinx.com
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