General Description

OSC2

OSCILLATOR

 

 

 

 

 

CARRIER

OSC1

 

 

 

 

MODULATOR

 

 

 

 

IRQEN

TRANSMITTER

 

 

 

 

 

VDD

 

÷ 2

 

INTERNAL

 

 

 

 

 

 

 

 

VSS

 

 

 

 

PROCESSOR

 

 

 

 

 

 

 

CLOCK

REGISTERDIRECTION

CPORT

 

COP

RTI

 

 

CORE TIMER

 

 

 

SYSTEM

 

 

 

SYSTEM

SYSTEM

 

 

 

 

 

 

 

 

 

 

RESET

 

 

 

 

 

DATA

 

 

 

 

 

 

 

 

LPRST

CPU

 

 

 

ALU

 

 

 

 

 

 

 

 

 

CONTROL

 

 

 

 

 

 

 

 

REGISTERDIRECTION

APORT

 

 

M68HC05 CPU

 

 

 

 

 

CPU REGISTERS

 

 

ACCUMULATOR

 

 

 

 

 

 

 

 

 

IRQEN

 

 

 

 

INDEX REGISTER

 

 

 

 

 

 

 

 

 

 

0

0 0 0 0

1

1

STACK POINTER

DATA

 

IRQ

0 0

PROGRAM COUNTER

 

 

 

 

 

 

 

 

 

 

 

CONDITION CODE REGISTER

1

1

1 H I N Z C

REGISTERDIRECTIONDATA

BPORT PULLUPSKEYSCAN

 

 

SRAM — 352 BYTES

 

 

 

 

 

 

ROM — 15,936 BYTES

 

 

 

 

BURN-IN ROM — 64 BYTES

 

 

* Marked pins are available only 44-lead PLCC package.

IRO

PC0

PC1

PC2

PC3

PC4*

PC5*

PC6*

PC7*

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

Figure 1-1. MC68HC05RC16 Block Diagram

General Release Specification

 

MC68HC05RC16 — Rev. 3.0

 

 

 

18

General Description

MOTOROLA