MSP430i204x, MSP430i203x, MSP430i202x devices have one active mode and four software-selectable low-power modes. An interrupt event can wake up the device from the low-power modes LPM0 to LPM4, service the request, and restore back to the low-power mode on return from the interrupt program.
The following five operating modes can be configured by software:
- Active mode (AM)
- Low-power mode 0 or low-power mode 1 (LPM0 = LPM1)
- CPU is disabled
- Internal regulator remains enabled
- DCO remains enabled
- MCLK is disabled
- ACLK and SMCLK remain active
- Low-power mode 2 or low-power mode 3 (LPM2 = LPM3)
- CPU is disabled
- Internal regulator remains enabled
- DCO remains enabled
- MCLK and SMCLK are disabled
- ACLK remains active
- Low-power mode 4 (LPM4)
- CPU is disabled
- Internal regulator remains enabled
- DCO is disabled
- MCLK, SMCLK, and ACLK are disabled
- Low-power mode 4.5 (LPM4.5)
- Internal regulator is disabled
- No RAM retention
- I/O pad state retention
- Wake from
RST/NMI, ports pins P2.1 or P2.2