ZC706 Evaluation Board User Guide
54
UG954 (v1.5) September 10, 2015
Feature Descriptions
The ZC706 evaluation board
I
2
C
bus topology is shown in
User applications that communicate with devices on one of the downstream I
2
C buses must
first set up a path to the desired bus through the U65 bus switch at I
2
C address
0x74
(
0b01110100
).
lists the address for each bus.
Information about the PCA9548 is available on the TI Semiconductor website at
For additional information on the Zynq-7000 AP SoC device I
2
C controller, see
Zynq-7000
All Programmable SoC Overview
(
Zynq-7000 All Programmable SoC Technical
Reference Manual
(
X-Ref Target - Figure 1-22
Figure 1-22:
I
2
C Bus Topology
CH7 - PMBUS_DATA/CLK
PCA9548
12C 1-to-8
Bus Switch
U65
CH6 - FMC_LPC_IIC_SDA/SCL
CH5 - FMC_HPC_IIC_SDA/SCL
CH4 - IIC_RTC_SDA/SCL
CH3 - PORT_EXPANDER_SDA/SCL
CH2 - EEPROM_IIC_SDA/SCL
CH1 - IIC_SDA/SCL_HDMI
CH0 - USRCLK_SFP_SDA/SCL
XC7Z045 AP SoC
PS Bank 501
(1.8V)
U1
UG954_c1_22_04113
XC7Z045 AP SoC
PL Bank 10
(2.5V)
U1
PCA9517
I
2
C
Level Shifter
U87
3.3 V
VADJ 2.5V
A
B
PCA9517
I
2
C
Level Shifter
U88
3.3 V
VCCMIO_PS 1.8V
A
B
IIC_SDA/SCL_MAIN
PS_SDA/SCL_MAIN
IIC_SCL/SDA_MAIN
Table 1-25:
I
2
C Bus Addresses
Device
I
2
C Switch Position
I
2
C Address
Device
PCA9548 8-Channel bus switch
NA
0b1110100
PCA9548 U65
Si570 clock
0
0b1011101
Si570 U37
0b1010000
SFP+ Conn. P2
ADV7511 HDMI
1
0b0111001
ADV7511 U53
I2C EEPROM
2
0b1010100
M24C08 U9
I2C port expander and
DDR3 SODIMM
3
0b0100001
Port Expander U16
0b1010000
0b0011000
DDR3 SODIMM J1
I2C real time clock and
Si5324 clock
4
0b1010001
RTC8564JE U26
0b1101000
SI5324 U60
FMC HPC
5
0bxxxxx00
FMC HPC J37
FMC LPC
6
0bxxxxx00
FMC LPC J5
UCD90120A pmbus
7
0b1100101
UCD90120A U48