Table of Contents
Advertisement
www.ti.com
The PORz signal is driven by a 3-input AND gate that generates a power on reset for the MAIN domain when:
•
The under voltage monitor (TPS3711DDCR) has an input voltage, VMAIN, that is below 4.48 V.
•
The 1.2-V buck converter (TPS62913RPUR) power good output is driven low by having an output voltage
that is below the power-good threshold.
•
The user push button (SW2) is pressed.
•
The Test Automation Header outputs a logic LOW signal (TA_PORZn) to a P-Channel MOSFET gate which
causes V_GS of the PMOS to be less than zero and so the PORz signal connects to the PMOS drain which
is tied directly to ground.
The PORz signal is tied to:
•
AM263x SoC PORz input
•
RGMII1 Ethernet PHY reset
•
ICSSM1 Gigabit Ethernet PHY reset
•
ICSSM2 Industrial Ethernet PHY reset
•
BOOTMODE buffer output enable
The WARMRESETn signal creates a warm reset to the MAIN domain when:
•
The user push button (SW4) is pressed.
•
The Test Automation Header outputs a logic LOW signal (TA_RESETz) to a P-Channel MOSFET gate which
causes V_GS of the PMOS to be less than zero and so the RESETz signal connects to the PMOS drain
which is tied directly to ground.
The WARMRESETn signal is tied to:
•
AM263x SoC WARMRESETN output
•
RESETz signal created from push button + PMOS logic
•
IO Expander reset
•
Micro SD reset
The AM263x Control Card also has an external interrupt to the SoC, INTn, that occurs when:
•
The user push button (SW1) is pressed.
•
The Test Automation Header outputs a logic LOW signal (TA_GPIO1) to a P-Channel MOSFET gate which
causes V_GS of the PMOS to be less than zero and so the INTn signal connects to the PMOS drain which is
tied directly to ground.
SPRUJ09C – MARCH 2022 – REVISED FEBRUARY 2023
Submit Document Feedback
Figure 4-4. WARMRESETn Reset Signal Tree
Copyright © 2023 Texas Instruments Incorporated
Hardware Description
AM263x Control Card Hardware User's Guide
19
Advertisement
Table of Contents
