3.0 FUNCTIONAL DESCRIPTIONS

3.1 REGISTER MAP

The register map of CTM8B5X is depicted as below:.

The Register Map of CTM8B54E/56E

Address

Description

00h

Indirect Addressing Register

01h

Timer0

02h

PC

03h

STATUS

04h

FSR

05h

PORTA

06h

PORTB

07h-1Fh

General Purpose Register

The Register Map of CTM8B55E

Address

Description

00h

Indirect Addressing Register

01h

Timer0

02h

PC

03h

STATUS

04h

FSR

05h

PORTA

06h

PORTB

07h

PORTC

08h-1Fh

General Purpose Register

The Register Map of CTM8B57E

Address

Description

FSR<6:5>

Bank 0

00

Bank 1

01

Bank 2

10

Bank 3

11

00h

Indirect Address-

ing Register

Map back to address in Bank 0

01h

Timer0

02h

PC

03h

STATUS

04h

FSR

05h

PORTA

06h

PORTB

07h

PORTC

08h~0Fh

General Purpose

Register

10h~1Fh

General Purpose

Register

30h~3Fh

General Purpose

Register

50h~5Fh

General Purpose

Register

70h~7Fh

General Purpose

Register

CMOS Microcontroller

EPROM-Based 8-Bit

CTM8B54E/55E/56E/57E

* All specs and applications shown above subject to change without prior notice.

1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C

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Rev 1.1 Dec 26,2001