The IWRL6432AOP device includes provision for an
ADC service for user application, where the GPADC engine present inside the device
can be used to measure up to two external voltages. The GPADC1
is used for this
purpose.
- GPADC is controlled by TI
firmware running inside the FEC sub-system and access for customer’s external
voltage monitoring purpose is via ‘APPSS’ calls routed to the FEC subsystem.
This API can be linked with the user application running on APPSS Cortex M4F®.
- Device Firmware package (DFP)
provides APIs to configure and measure these signals. The API allows configuring
the settling time (number of ADC samples to skip) and number of consecutive
samples to take. At the end of a frame, the minimum, maximum and average of the
readings is reported for each of the monitored voltages.
GPADC structures are used for
measuring the output of internal temperature sensors. The accuracy of these
measurements is ±7°C.