The maximum clock frequency of the MSP430F2419TPMR is 16 MHz.
To configure the MSP430F2419TPMR for low power consumption, use the low-power modes (LPM3, LPM4) and adjust the clock frequency, disable unnecessary peripherals, and use the built-in power management features.
Yes, the MSP430F2419TPMR can be used with an external crystal oscillator. The device has an internal oscillator, but an external crystal oscillator can be used for more accurate clocking.
The MSP430F2419TPMR can be programmed using the Texas Instruments Code Composer Studio (CCS) or IAR Embedded Workbench. The device can be programmed using the JTAG or Spy-Bi-Wire interfaces.
The MSP430F2419TPMR has 92KB of flash memory available for program storage.