System Controller; I2C Bus Management - Xilinx ZCU1285 User Manual

Table 23: FMC3 HPC Connections at JA4 (cont'd)
RFSoC (U1) Pin
F9
G12
G11
C13

System Controller

The ZCU1285 board uses a Xilinx XC7Z010-CLG225 Zynq-7000 SoC System Controller U38
that can be used to:
• Select the output frequencies of the SuperClock2 Module
• Select the output frequencies of the SuperClock-RF2 Module
• Monitor the onboard power system (PMBus)
See Appendix E: System Controller
System Controller Reset
The SYS_POR pushbutton SW4 (callout 10,
System Controller's active-Low power-on-reset signal. When SYS_POR is reasserted, the System
Controller is reconfigured from the design stored on its dedicated quad SPI (QSPI) flash memory.
System Controller Status LEDs
DS1, DS12, DS16, and DS27 (callout 10,
System Controller's INIT_B, DONE, STATUS, and ERROR status, respectively.

I2C Bus Management

The I2C bus is routed through U22, an 8-channel I2C-bus multiplexer (NXP Semiconductor
TCA9548A). The I2C address of the multiplexer is 0x75. The multiplexer routes I2C/PMBus
communication between the bus master (System Controller or RFSoC) and eight sub-systems:
• Onboard regulators and power monitoring for RFSoC logic, processor, and transceivers
• Onboard regulators and power monitoring for RF data converters
UG1348 (v1.0) July 16, 2019
ZCU1285 Board User Guide
Chapter 1: ZCU1285 Board Features and Operation
Net Name
FMC3_LA32N
FMC3_LA33P
FMC3_LA33N
FMC3_PRSNT_M2C_L
for information on the System Controller menu options.
Figure 2: Board Component
Figure 2: Board Component
FMC Pin
H38
G36
G37
H2
Locations) asserts the
Locations) enunciate the
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