MDT10C55B

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P. 3

2006/12

Ver. 1.0

6. Memory Map

(A) Register Map

Address

Description

00

Indirect Addressing Register

01

RTCC

02

PC

03

STATUS

04

MSR

06

Port B

07

Port C

08~1F

30~3F

50~5F

70~7F

General purpose registers

(1) IAR (Indirect Address Register) : R0

(2) RTCC (Real Time Counter/Counter register) : R1

(3) PC (Program Counter) : R2

Write PC, CALL --- always 0

JUMP --- from instruction word

RTWI, RET --- from STACK

A9

A8

A7~A0

Write PC, JUMP, CALL --- from STATUS b5

RTWI, RET --- from STACK

Write PC --- from ALU

JUMP, CALL --- from instruction word

RTWI, RET --- from STACK