Computer Hardware User Manual

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MC68HC05RC8

General Release Specification MC68HC05RC16 — Rev. 3.0

120 MC68HC05RC8 MOTOROLA

Figure A-1. MC68HC05RC8 Memory Map

I/O

32 BYTES

RAM

160 BYTES

STACK

64 BYTES

RAM

128 BYTES

USER ROM

8112 BYTES

BURN-IN ROM

& VECTORS

USER VECTORS

16 BYTES

$0000

$001F

$0020

$00BF

$00C0

$00FF

$0100

$017F

$0180

$3FAF

$3FB0

$3FEF

$3FF0

$3FFF

0000

0031

0032

0191

0192

0255

0383

0384

16303

16304

16367

16368

16383

0256

PORT A DATA REGISTER

PORT B DATA REGISTER

PORT C DATA REGISTER

PORT A DATA DIRECTION REGISTER

PORT B DATA DIRECTION REGISTER

PORT C DATA DIRECTION REGISTER

CORE TIMER CONTROL & STATUS REG.

RESERVED

$00

$01

$02

$03

$04

$05

$06

$07

$08

$09

$0F

64 BYTES

RESERVED

RESET VECTOR (LOW BYTE)

RESET VECTOR (HIGH BYTE)

SWI VECTOR (LOW BYTE)

SWI VECTOR (HIGH BYTE)

IRQ/PTB KEYSCAN PULLUPS

IR TIMER VECTOR (LOW BYTE)

IR TIMER VECTOR (HIGH BYTE)

CORE TIMER VECTOR (LOW BYTE)

$3FF0

$3FF5

$3FF6

$3FF7

$3FF8

$3FF9

$3FFA

$3FFB

$3FFC

$3FFD

$3FFE

UNUSED

$3FFF

RESERVED

$18

$1F

RESERVED

$1E

$10

$11

$12

$13

$14

$15

$16

$17

IR TIMER CHR1

IR TIMER CLR1

IR TIMER CHR2

IR TIMER CLR2

IR TIMER MCSR

IR TIMER MDR1

IR TIMER MDR2

IR TIMER MDR3

CORE TIMER VECTOR (HIGH BYTE)

UNUSED

$0A

CORE TIMER COUNTER REGISTER

. . . . . . .

... ..

VECTOR (HIGH BYTE)

VECTOR (LOW BYTE)

RESERVED

. . . . . . .

$1FFF

$2000

UNUSED