Freescale Semiconductor, Inc.
Advance Information — MC68HC908RFRK2
Section 1. General Description
1.1 Contents
1.2
1.3
1.4
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
MCU Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
1.5
1.5.1
1.5.2
1.5.3
1.5.4
1.5.5
Power Supply Pins (V and V ). . . . . . . . . . . . . . . . . . . .27
DD SS
Oscillator Pins (OSC1 and OSC2) . . . . . . . . . . . . . . . . . . . .28
External Reset (RST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
External Interrupt Pin (IRQ1) . . . . . . . . . . . . . . . . . . . . . . . .28
Port A Input/Output Pins
(PTA7, PTA6/KBD6–PTA1/KBD1, and PTA0) . . . . . . . .29
Port B Input/Output Pins (PTB3/TCLK,
PTB2/TCH0, PTB1, and PTB0/MCLK) . . . . . . . . . . . . . .29
UHF Transmitter Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
1.5.6
1.5.7
1.2 Introduction
The MC68HC908RFRK2 MCU is a member of the low-cost,
high-performance M68HC08 Family of 8-bit microcontroller units
(MCUs). Optimized for low-power operation and available in a small
32-pin low-profile quad flat pack (LQFP), this MCU is well suited for
remote keyless entry (RKE) transmitter designs.
The M68HC08 Family is based on the customer-specified integrated
circuit (CSIC) design strategy. All MCUs in the family use the enhanced
M68HC08 central processor unit (CPU08) and are available with a
variety of modules, memory sizes and types, and package types.
MC68HC908RFRK2
MOTOROLA
Advance Information
General Description
23
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