The AMD System Monitor (SYSMON) is a
valuable function that allows users to easily monitor the operating environment of an
AMD device using on-chip sensors capable of
measuring voltage, temperature, current via a sense resistor, and external measurements
using an analog-to-digital converter (ADC). The SYSMON is integrated on all Versal devices and can directly replace external ADCs that
are required by many applications. It has built-in features, including channel
averaging, configurable over-temperature shutdown, and voltage and temperature alarm
interrupts that can be applied in any user configuration. To further complement the
Versal device, the SYSMON enables customers to
reduce their BOM count, improve monitoring flexibility, and increase the security of
their system in an easy to configure format.
Note: SYSMON is the only AMD supported
method to measure junction temperature (Tj). For more information, see
Versal
Adaptive SoC System Monitor Architecture Manual (AM006).
On-chip monitoring can be used to detect when rails within the Versal device are powered on or off and as a part of the sequencing for power rail status. Also, the voltage supply alarms can be used to detect when the voltages are out of specifications, which might require a power-down in case of a failed power sequence. This monitoring removes the need to use the power good signals from the VRMs and saves on I/O pins.
Figure 1. Versal CIPS Configuration of On-chip Monitoring
