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Figure 11-5 presents an example, when the system power supply voltage is nominally 5 V and the desired

trigger threshold is -10% or 4.5 V.

Device

VMON_VSYS

SPRSP56_VMON_ER_MON_01

VSS

4.81 k

Ω

40.2 k

Ω ±

VSYS

Value = Determined by system designer

(System Power Supply)

Figure 11-5. System Supply Monitor Voltage Divider Circuit

The VMON2_IR_VCPU pin provides a way to monitor VDD_CPU power supply. Must be externally connected as

close as possible to VDD_CPU pin on the board. SoCs that have a VMON6_IR_VEXT0P8 can optionally monitor

other domains such as VDD_CORE or VDD_MCU. Similarly, those signals should be as close as possible to

VDD_CORE or VDD_MCU pin on the board.

The VMON3_IR_VEXT1P8 and VMON4_IR_VEXT1P8 pins provide a way to monitor an external 1.8-V power

supply. The VMON5_IR_VEXT3P3 pin provides a way to monitor an external 3.3-V power supply. An internal

resistor divider with software control is implemented inside the SoC. Software can program the internal resistor

divider to create appropriate under voltage and over voltage interrupts. These pins should not be sourced from

an external resistor divider. If the monitored voltage requires adjustment, be sure to buffer the divided voltage

prior connecting to monitor pin.

11.5 High Speed Differential Signal Routing Guidance

The High Speed Interface Layout Guidelines provides guidance for successful routing of the high speed

differential signals. This includes PCB stackup and materials guidance as well as routing skew, length and

spacing limits. TI supports only designs that follow the board design guidelines contained in the application

report.

11.6 Thermal Solution Guidance

The Thermal Design Guide for DSP and ARM Application Processors provides guidance for successful

implementation of a thermal solution for system designs containing this device. This document provides

background information on common terms and methods related to thermal solutions. TI only supports designs

that follow system design guidelines contained in the application report.

www.ti.com

AM69A

SPRSP92 – FEBRUARY 2023

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AM69AX Datasheet(PDF) 287 Page - Texas Instruments