SYSMON Dedicated Pinout Requirements

Versal ACAP System Monitor Architecture Manual (AM006)

Document ID
AM006
Release Date
2022-05-17
Revision
1.3 English

The following table describes the pin functions used in the SYSMON. These are the dedicated SYSMON pins that appear in the PMC portion of the device package.

Table 1. SYSMON Package Pins
Package Pin Type Description
VCCAUX_SMON Power supply This is the analog supply pin for the ADC and other analog circuits in the SYSMON. The pin must be tied to the 1.5V VCCAUX_PMC supply. See Analog Power Supply and Ground for more information and filter considerations. This pin must never be tied to GND.
VP Dedicated analog input This is the positive input terminal of the dedicated differential analog input channel (VP/VN). The analog input channel is very flexible and supports multiple analog input signal types. For more information, see External Analog Inputs. This pin must be connected to GND_SMON if not used.
VN Dedicated analog input This is the negative input terminal of the dedicated differential analog input channel (VP/VN). The analog input channel is very flexible and supports multiple analog input signal types. For more information, see External Analog Inputs. This pin must be connected to GND_SMON if not used.
GND_SMON Power supply This is the ground reference pin for the ADC and other analog circuits in the SYSMON. It can be tied to the system ground with an isolating ferrite bead as shown in the SYSMON Pinout Requirements figure in Analog Power Supply and Ground. In a mixed-signal system, this pin must be tied to an analog ground plane (if available), in which case the ferrite bead is not required. See Analog Power Supply and Ground for more information.
VREFP Reference voltage input This pin can be tied to an external 1.024V accurate reference IC. It must be treated as an analog signal that together with the VREFN signal provides a differential 1.024V voltage. By connecting this pin to GND_SMON, an on-chip reference source is activated (see the SYSMON Pinout Requirements figure in Analog Power Supply and Ground. This pin must be connected to GND_SMON if an external reference is not supplied. See Reference Inputs (VREFP and VREFN) for more information.
VREFN Reference voltage input This pin must be tied to ground pin of an external 1.024V accurate reference IC. It must be treated as an analog signal that, together with the VREFP signal, provides a differential 1.024V voltage. This pin must always be connected to GND_SMON even if an external reference is not supplied. See Reference Inputs (VREFP and VREFN) for more information.
I2C_SCLK/SMBCLK SYSMON I2C/PMBUS ports that can be assigned to multi-function MIO pins Optional I2C/PMBUS port that can be used to support the I2C or PMBUS interface to the SYSMON. Only active when I2C/PMBUS interface is used.
I2C_SDA/SMBDAT SYSMON I2C/PMBUS ports that can be assigned to multi-function MIO pins Optional I2C/PMBUS port that can be used to support the I2C or PMBUS interface to the SYSMON. Only active when I2C/PMBUS interface is used.
SMBALERT SYSMON PMBUS ports that can be assigned to multi-function MIO pins Optional PMBus alert. When low, indicates a system fault that must be cleared using PMBUS commands. Only active when PMBUS interface is used.