Xilinx Zynq UltraScale+ ZCU208 - Page 30

Figure 6: I2C0 and I2C1 Bus Connectivity Overview
Zynq UltraScale+
RFSoc PS-Side
RFSoC PL-Side
I2C0
PS_I2C0
PS_I2C1
PL_I2C0
PL_I2C1
0x74
0
1
2
3
4
5
6
7
EEPROM
SI5341
USER_SI570_C0
USER_MGT_S1570
8A34001
CLK104
RFMC_2
N.C.
12C
Mux
0x75
0
1
2
3
4
5
6
7
FMC+ HSPC
USER_SI570_C1
SYSMON (DNP resistors)
PS_DDR4_SODIMM
SFP3
SFP2
SFP1
SFP0
12C
Mux
0x75
0
1
2
3
INA226 PMBus
N.C.
IRPS5401 (PS + PL Voltage Controller PMBus)
SYSMON
12C Mux
#3
PMBus Cable
0x20
U15 TCA6416A
System Controller
P3
P4
U38 MSP430
U23 PCA9544A
J21
U22 TCA9548A
U26 TCA9548A
I2C1
U1 XCZU48DR
L/S
U13
L/S
U14
L/S
U19
L/S
U18
GPIO
Expander
0
1
2
3
5
6
7
0
3
5
6
7
P0
P1
MAX6643_OT_B
MAX6643_FF_B
MIO26_PMU_IN
DAC_VOUT_SEL
IIC_MUX_RST_B
GEM3_RST_B
MAX6643_FSPD
FMCP_PRSNT
VINT_VRHOT_B
8A34001_RST_B
IRPS_ALERT_B
INA_ALERT_B
X23643-031320
I2C0 (MIO 14-15)
[Figure 2, callout 17]
I2C bus I2C0 connects Zynq UltraScale+ RFSoC U1 PS Bank 500, PL bank 89, 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 accepng
various alarm inputs without requiring the PL-side to be congured. 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.
Chapter 3: Board Component Descriptions
UG1410 (v1.0) July 8, 2020 www.xilinx.com
ZCU208 Board User Guide 30
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