MSP430 Operating Mode

==========================================================================================

The MSP430 has one active mode and five software selectable low-power modes of operation. An interrupt

event can wake up the device from any of the low-power modes, service the request, and restore back to the

low-power mode on return from the interrupt program.

The following six operating modes can be configured by software:

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

? Active mode (AM)

– All clocks are active

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

? Low-power mode 0 (LPM0)

– CPU is disabled

– ACLK and SMCLK remain active, MCLK is disabled

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

? Low-power mode 1 (LPM1)

– CPU is disabled

– ACLK and SMCLK remain active, MCLK is disabled

– DCO's dc generator is disabled if DCO not used in active mode

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------

? Low-power mode 2 (LPM2)

– CPU is disabled

– MCLK and SMCLK are disabled

– DCO's dc generator remains enabled

– ACLK remains active

----------------------------------------------------------------------------------------------------------------------------------------------------------------------

? Low-power mode 3 (LPM3)

– CPU is disabled

– MCLK and SMCLK are disabled

– DCO's dc generator is disabled

– ACLK remains active

----------------------------------------------------------------------------------------------------------------------------------------------------------------------

? Low-power mode 4 (LPM4)

– CPU is disabled

– ACLK is disabled

– MCLK and SMCLK are disabled

– DCO's dc generator is disabled

– Crystal oscillator is stopped

===========================================================================================