MC68HC908RF2 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

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MC68HC908RF2

HCMOS Microcontroller Unit

Motorola => Freescale 

General Description

1.3 Features

Advance Information

26

Features of the MC68HC908RF2 MCU include:

• High-performance M68HC08 architecture

• Fully upward-compatible object code with M6805, M146805, and

M68HC05 Families

• 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

• 2 Kbytes of on-chip FLASH memory

• FLASH program memory security(1)

• 128 bytes of on-chip RAM

• 16-bit, 2-channel timer interface module (TIM)

• 12 general-purpose input/output (I/O) ports:

– Six shared with keyboard wakeup function

– Two shared with the timer module

– Port A pins have 3-mA sink capabilities

• Low-voltage inhibit (LVI) module:

– 1.85-V detection forces MCU into reset

– 2.0-V detection sets indicator flag

• 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.

General Description

MC68HC908RF2 — Rev. 1

MOTOROLA

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