I2C Bus - Xilinx ZC702 User Manual

Table 1-18: ADV7511 to HDMI Receptacle Connections (Cont'd)
ADV7511 (U40)
42
33
32
54
53
52
51
48
Information about the ADV7511KSTZ-P is available on the Analog Devices website

I2C Bus

[Figure 1-2, callout 14]
The ZC702 board implements a single I2C port on the XC7Z020 SoC (IIC_SDA_MAIN,
IIC_SDA_SCL), which is routed through an TI Semiconductor PCA9548 1-to-8 channel I2C
bus switch (U44). The bus switch can operate at speeds up to 400 kHz.
The bus switch I2C address is
select the desired downstream device.
The ZC702 board I2C bus topology is shown in
X-Ref Target - Figure 1-16
U1
XC7Z020
SoC
PL Bank 13
(2.5V)
U1
XC7Z020
SoC
PS Bank 501
(VCCMIO_PS 1.8V)
ZC702 Board User Guide
UG850 (v1.7) March 27, 2019
Net Name
HDMI_D2_N
HDMI_CLK_P
HDMI_CLK_N
HDMI_DDCSDA
HDMI_DDCSCL
HDMI_HEAC_P
HDMI_HEAC_N
HDMI_CEC
(
0x74 0b1110100
VADJ 2.5V
U56
PCA9517
2
I C
Level Shifter
A
IIC_SCL/SDA_MAIN
VCCMIO_PS 1.8V
U57
PCA9517
2
I C
Level Shifter
A
PS_SDA/SCL_MAIN
Figure 1-16: I2C Bus Topology
www.xilinx.com
HDMI Receptacle P1 Pin
3
10
12
16
15
14
19
13
) and must be addressed and configured to
Figure 1-16.
3.3 V
U44
PCA9548
1 2 C 1-to-8
Bus Switch
B
IIC_SDA/SCL_MAIN
3.3 V
B
Feature Descriptions
[Ref 21].
CH0 - USER_CLK_SDL/SCL
CH1 - IIC_SDA/SCL_HDMI
CH2 - EEPROM_IIC_SDA/SCL
CH3 - PORT_EXPANDER_SDA/SCL
CH4 - IIC_RTC_SDA/SCL
CH5 - FMC1_LPC_IIC_SDA/SCL
CH6 - FMC2_LPC_IIC_SDA/SCL
CH7 - PMBUS_DATA/CLK
UG850_C1_16_062918
38
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