Hello,
looking at the AWR1843 datasheet, table 4-3, it lists a bunch of UART signals:
- BSS_UART_TX
- DSS_UART_TX
- MSS_UARTA_RX + _TX
- MSS_UARTB_RX + _TX
- RS232_RX + _TX
The MSS* and DSS* signals make sense to me since they match the single DSS SCI module and dual MSS SCI modules specified in the TRM section 3.1.2.x. BSS_ is presumably something that TI uses in development of the radar subsystem firmware. That leaves one set of unexplained signals:
What peripheral of the AWR18 are the RS232* signals connected to and what are they typically used for?
Looking at the mmw demo source code (SDK 2), the pinmux is set up to bring out UARTA signals on the N4 and N5 balls. RS232_TX/RX don't appear to be used. The bootloader flow document also mentions that the MSS UARTA is used. The function of the mysterious 'debug UART' doesn't seem to be explained anywhere.
Best regards,
Sebastian
