MC68HC908RK2 Datasheet, PDF (23/232 Pages) Motorola, Inc – Microcontroller Unit

Advance Information — MC68HC908RK2
Section 1. General Description
1.1 Contents
1.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
1.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
1.4 MCU Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
1.5 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
1.5.1
1.5.2
Power Supply Pins (V_DD and V_SS) . . . . . . . . . . . . . . . . . . . .27
Oscillator Pins (OSC1 and OSC2) . . . . . . . . . . . . . . . . . . . .28
1.5.3 External Reset (RST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.5.4 External Interrupt Pin (IRQ1) . . . . . . . . . . . . . . . . . . . . . . . .28
1.5.5 Port A Input/Output Pins (PTA7,
PTA6/KBD6–PTA1/KBD1, and PTA0) . . . . . . . . . . . . . . 29
1.5.6 Port B Input/Output Pins (PTB5, PTB4/TCH1,
PTB3/TCLK, PTB2/TCH0, PTB1,
and PTB0/MCLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.2 Introduction
The MC68HC908RK2 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
20-pin SSOP/SOIC package, 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.
MC68HC908RK2 — Rev. 4.0
MOTOROLA
General Description
Advance Information
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