mc68hc908rk2 Freescale Semiconductor, Inc, mc68hc908rk2 Datasheet - Page 23

• Manufacturer Part Number: mc68hc908rk2
• Description: Hcmos Microcontroller Unit
• Manufacturer: Freescale Semiconductor, Inc

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