(3)
If it is desired to disable the watchdog through hardware, GPIO_8 is required and must be set high by the time nRSTOUT goes high.
After nRSTOUT is high, the watchdog state is latched and the pin can be configured for other functions through software. If GPIO_8 is
not set high, then the processor must service the watch dog before the long window expires.
4 Supporting Functional Safety Systems
By using the TPS65941515-Q1 solution to power the DRA821 processor, the system can leverage the following
PMIC functional safety features:
• Input Supply Monitoring
• Output Voltage and Current Monitoring
• Question and Answer Watchdog
• Fault Reporting Interrupts
• Enable Drive Pin that provides an independent path to disable system actuators
• Error Pin Monitoring
• Internal Diagnostics including voltage monitoring, temperature monitoring, and Built-In Self-Test
Refer to the Safety Manual of the TPS6594-Q1 device for full descriptions and analysis of the PMIC functional
safety features. These functional safety features can assist in achieving up to ASIL-D rating for a system.
Additionally, these features help in achieving the functional safety assumptions utilized by the processor to
achieve up to ASIL-D rating. See the DRA821 Safety Manual for Jacinto
™
7 Processors for a complete list of
functional safety system assumptions.
Supporting Functional Safety Systems
SLVUCD4 – NOVEMBER 2022
User Guide for Powering Jacinto
TM
7 J7200 DRA821 with Single TPS6594-Q1
PMIC, PDN-2A
9
Copyright © 2022 Texas Instruments Incorporated
