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MC9S12P64CFT Datasheet, PDF (20/566 Pages) Freescale Semiconductor, Inc – Microcontrollers | |||
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Device Overview MC9S12P-Family
1.3.3 On-Chip SRAM
⢠Up to 6 Kbytes of general-purpose RAM
1.3.4 Main External Oscillator (XOSC)
⢠Loop control Pierce oscillator using a 4 MHz to 16 MHz crystal
â Current gain control on amplitude output
â Signal with low harmonic distortion
â Low power
â Good noise immunity
â Eliminates need for external current limiting resistor
â Transconductance sized for optimum start-up margin for typical crystals
1.3.5 Internal RC Oscillator (IRC)
⢠Trimmable internal reference clock.
â Frequency: 1 MHz
â Trimmed accuracy over â40ËC to +125ËC ambient temperature range: ±1.5%
1.3.6 Internal Phase-Locked Loop (IPLL)
⢠Phase-locked-loop clock frequency multiplier
â No external components required
â Reference divider and multiplier allow large variety of clock rates
â Automatic bandwidth control mode for low-jitter operation
â Automatic frequency lock detector
â Conï¬gurable option to spread spectrum for reduced EMC radiation (frequency modulation)
â Reference clock sources:
â External 4â16 MHz resonator/crystal (XOSC)
â Internal 1 MHz RC oscillator (IRC)
1.3.7 System Integrity Support
⢠Power-on reset (POR)
⢠System reset generation
⢠Illegal address detection with reset
⢠Low-voltage detection with interrupt or reset
⢠Real time interrupt (RTI)
⢠Computer operating properly (COP) watchdog
â Conï¬gurable as window COP for enhanced failure detection
S12P-Family Reference Manual, Rev. 1.13
20
Freescale Semiconductor
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