The maximum clock frequency of the MSP430F5438AIPZR is 18 MHz.
To configure the MSP430F5438AIPZR for low-power operation, use the Power Management Module (PMM) to select the desired power mode (e.g., LPM3 or LPM4) and adjust the clock frequency and voltage regulator settings accordingly.
Yes, the MSP430F5438AIPZR can be used with an external crystal oscillator. The device has an internal oscillator that can be used, but an external crystal oscillator can provide better frequency stability and accuracy.
The MSP430F5438AIPZR can be programmed using the Texas Instruments Code Composer Studio (CCS) integrated development environment (IDE) or other third-party development tools. The device can be programmed using the JTAG or Spy-Bi-Wire interfaces.
The MSP430F5438AIPZR has 256 KB of flash memory available for program storage.