The maximum clock frequency of the MSP430F5659IZCAT is 25 MHz.
To configure the MSP430F5659IZCAT for low power consumption, use the Low Power Mode 3 (LPM3) or Low Power Mode 4 (LPM4) modes, which can reduce power consumption to as low as 1.1 μA. Additionally, disable unused peripherals and use the Power Manager to control power consumption.
Yes, the MSP430F5659IZCAT 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 MSP430F5659IZCAT can be programmed using the Texas Instruments Code Composer Studio (CCS) integrated development environment (IDE) or the IAR Embedded Workbench. The device can be programmed using the JTAG or Spy-Bi-Wire interfaces.
The MSP430F5659IZCAT has 328 KB of flash memory available for program storage.