MC9S12A128BCPV datasheet by Freescale Semiconductor

MC9S12A128BCPV Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the MC9S12A128BCPV?
  The maximum operating frequency of the MC9S12A128BCPV is 25 MHz, but it can be overclocked to 30 MHz with some limitations.
• How do I configure the clock source for the MCU?
  The clock source can be configured using the Clock Generation Module (CGM) registers. The CGM allows selection of the clock source, clock frequency, and clock mode. The default clock source is the internal oscillator, but it can be changed to an external clock source or the Phase-Locked Loop (PLL) clock source.
• What is the maximum amount of RAM and flash memory available on the MC9S12A128BCPV?
  The MC9S12A128BCPV has 128 KB of flash memory and 12 KB of RAM.
• How do I implement a watchdog timer on the MC9S12A128BCPV?
  The MC9S12A128BCPV has a built-in Computer Operating Properly (COP) watchdog timer that can be enabled and configured using the COP control registers. The COP timer can be set to timeout after a specified period of inactivity, and can be reset by writing to the COP control registers.
• What are the different low-power modes available on the MC9S12A128BCPV?
  The MC9S12A128BCPV has several low-power modes, including Stop mode, Wait mode, and Doze mode. Stop mode shuts down the CPU and most peripherals, while Wait mode shuts down the CPU but keeps some peripherals active. Doze mode reduces the CPU clock frequency to conserve power.