• In-band SC firmware update: Allows the SC firmware to be updated using PCIe technology.
The I2C interface is connected to MIO pins of the Zynq
®
Ult™ RFSoC PS, meaning that
an integrated IP solution is available. The I2C interface must be operated in slave mode and
cannot be a master because the SC is the master, and drives an SCL clock.
Reset Request Power Reduction
It might be necessary for the SC to request the Zynq
®
Ult™ RFSoC to reduce power if a
temperature or power consumption threshold has been reached. This request is made with the
following handshake signals:
•
RF_CPU_RST
: This signal is asserted by the SC to indicate to the Zynq
®
Ult™ RFSoC
to reduce the 5G workload power. The Zynq
®
Ult™ RFSoC must keep the PCIe
interface functional to enable any maintenance on telemetry operations with the ost.
•
RF_RST_REQ
: This signal is asserted by the Zynq
®
Ult™ RFSoC to acknowledge the
power reduction request by the SC, and to avoid a fatal power cutoff protection mechanism.
The SC is always powered.
UART – Maintenance Port Accessible
A UART port on the Zynq
®
Ult™ RFSoC, accessible through the maintenance port, can
be used for development purposes. The UART signals are as follows:
•
RF_DBG_RX
: Maintenance port UART receive
•
RF_DBG_TX
: Maintenance port UART transmit
The UART port is connected to MIO pins of the Zynq
®
Ult™ RFSoC PS, meaning that an
integrated IP solution is available.
To use the UART through the maintenance port, you need a DMB II dongle. Refer to
for more details.
General Purpose Signals
•
RF_LED
: A yellow LED is available as a general purpose indicator. It is located on the I/O
bracket immediately next to the green power-on LED.
Special Function Pins
The following table summarizes the special functions pin map.
Chapter 3: Pin Mapping
UG1496 (v1.0) June 15, 2022
T2 Telco Accelerator Card User Guide
19
