SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
Each UART uses a 48-MHz functional clock for its logic and to generate external interface signals. Each UART uses an interface clock for register accesses. The PRCM module generates and controls all these clocks (for more information, see Clock Domain-Level Clock Management, in Power, Reset, and Clock Management).
The idle and wake-up processes use a handshake protocol between the PRCM and the UART (for a description of the protocol, see Clock Domain Level Clock Management, in Power, Reset, and Clock Management). The UARTi.UART_SYSC[4:3] IDLEMODE bit field controls UART idle mode.