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MSP430L092 Datasheet(PDF) 7 Page - Texas Instruments |
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MSP430L092 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 46 page  MSP430L092 MSP430C09x www.ti.com SLAS673 – SEPTEMBER 2010 Operating Modes 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 five 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 for all sources – MCLK is disabled • Low-power mode 1 (LPM1) – CPU is disabled – ACLK and SMCLK remain active (for LF oscillator and CLKIN as source, HF oscillator is mapped to LF oscillator as source) – MCLK is disabled • Low-power mode 2 (LPM2) – CPU is disabled – MCLK is disabled – SMCLK is disabled – ACLK remains active for all sources • Low-power mode 3 (LPM3) – CPU is disabled – MCLK is disabled – SMCLK is disabled – ACLK remains active (for LF oscillator and CLKIN as source, HF oscillator is mapped to LF oscillator as source) • Low-power mode 4 (LPM4) – CPU is disabled – MCLK is disabled – SMCLK is disabled – ACLK is disabled – Oscillators are stopped LPM2 vs LPM3 If only MCLK is feed by the HF oscillator (SELA ≠ 00, SELS ≠ 00, SELM = 00 of CCSCTL4 register) the following behavior is implemented: • Entering LPM2 turns off the HF oscillator and starts again with the HF oscillator selected for MCLK • Entering LPM3 turns off the HF oscillator and starts again with the LF oscillator selected for MCLK The only difference between LPM2 and LPM3 is the selection of the source for MCLK when re-entering active mode and, therefore, and the level of power savings. Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 7 |
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