SPRAD21E May 2023 – February 2024 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP , AM62A3 , AM62A3-Q1 , AM62A7 , AM62A7-Q1 , AM62P , AM62P-Q1
Verify the UART interface application requirements (external interface or debug) and configuration (2-wire or 4-wire with flow control). For the number of UART instances supported, see the device-specific data sheet.
When an external transceiver is used, make sure the external interface signal levels matches the Dual-voltage IO supply voltage level.
Recommend provisioning for series resistors on the interface signals (close to source) for isolation or debug. It is recommended to add pullup resistor on the UART Receive pins (UART0..6_RXD, MCU_UART0..1_RXD).
External ESD protection is recommended in case the interface signals from the processor are directly connected to an external connector.
UART interface is frequently hooked up incorrectly. Make sure signals are connected as follows:
If additional interface signals are used, verify the connections.