Freescale Semiconductor, Inc.
General Description
1.3 Features
Features of the MC68HC908RFRK2 MCU include:
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High-performance M68HC08 architecture
Fully upward-compatible object code with M6805, M146805, and
M68HC05 Families
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Maximum internal bus frequency of 4 MHz at 3.3 volts
Maximum internal bus frequency of 2 MHz at 1.8 volts
Internal oscillator requiring no external components:
– Software selectable bus frequencies
– ±25 percent accuracy with trim capability to ±2 percent
– Option to allow use of external clock source or external
crystal/ceramic resonator
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2 Kbytes of on-chip FLASH memory
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FLASH program memory security
128 bytes of on-chip RAM
16-bit, 2-channel timer interface module (TIM)
14 general-purpose input/output (I/O) ports:
– Six shared with keyboard wakeup function
– Three shared with the timer module
– Port A pins have 3-mA sink capabilities
Low-voltage inhibit (LVI) module:
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– 1.85-V detection forces MCU into reset
– 2.0-V detection sets indicator flag
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6-bit keyboard interrupt with wakeup feature
External asynchronous interrupt pin with internal pullup (IRQ1)
Ultra high frequency (UHF) transmitter
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or
copying the FLASH difficult for unauthorized users.
Advance Information
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MC68HC908RFRK2
General Description
MOTOROLA
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