Datasheet

dsPIC30F2011/2012/3012/3013

15.10 UART Operation During CPU

Sleep and Idle Modes

15.10.1 UART OPERATION DURING CPU

SLEEP MODE

When the device enters Sleep mode, all clock sources

to the module are shut down and stay at logic ‘0’. If

entry into Sleep mode occurs while a transmission is in

progress, then the transmission is aborted. The UxTX

pin is driven to logic ‘1’. Similarly, if entry into Sleep

mode occurs while a reception is in progress, then the

reception is aborted. The UxSTA, UxMODE, transmit

and receive registers and buffers, and the UxBRG

If the WAKE bit (UxMODE<7>) is set before the device

enters Sleep mode, then a falling edge on the UxRX pin

will generate a receive interrupt. The Receive Interrupt

Select mode bit (URXISEL) has no effect for this

function. If the receive interrupt is enabled, then this will

wake-up the device from Sleep. The UARTEN bit must

be set in order to generate a wake-up interrupt.

15.10.2 UART OPERATION DURING CPU

IDLE MODE

For the UART, the USIDL bit selects if the module will

stop operation when the device enters Idle mode or

whether the module will continue on Idle. If USIDL = 0,

the module will continue to operate during Idle mode. If

USIDL = 1, the module will stop on Idle.