Introduction
The MC68HC11F1 is a high-performance member of the M68HC11 family of microcontroller units (MCUs). High-speed expanded systems required the development of this chip with its extra input/output (I/O) ports, an increase in static RAM (one Kbyte), internal chip-select functions, and a non-multiplexed bus which reduces the need for external interface logic. The timer, serial I/O, and analog-to-digital (A/ D) converter enable functions similar to those found in the MC68HC11E9.
   
Features
• MC68HC11 CPU
• 512 Bytes of On-Chip Electrically Erasable Programmable ROM
    (EEPROM) with Block Protect (MC68HC11F1 only)
• 1024 Bytes of On-Chip RAM (All Saved During Standby)
• Enhanced 16-Bit Timer System
    — 3 Input Capture (IC) Functions
    — 4 Output Compare (OC) Functions
    — 4th IC or 5th OC (Software Selectable)
• On-Board Chip-Selects with Clock Stretching
• Real-Time Interrupt Circuit
• 8-Bit Pulse Accumulator
• Synchronous Serial Peripheral Interface (SPI)
• Asynchronous Nonreturn to Zero (NRZ)
    Serial Communication Interface (SCI)
• Power saving STOP and WAIT Modes
• Eight-Channel 8-Bit A/D Converter (MC68HC11F1 only)
• Computer Operating Properly (COP) Watchdog System
    and Clock Monitor
• Bus Speeds of up to 6 MHz for the MC68HC11FC0
    and up to 5 MHz for the MC68HC11F1
• 68-Pin PLCC (MC68HC11F1 only), 64-Pin QFP (MC68HC11FC0 only),
    and 80-pin TQFP package options