M37640E8 データシートの表示（PDF） - MITSUBISHI ELECTRIC

部品番号

コンポーネント説明

一致するリスト

M37640E8

Single-Chip 8-BIT CMOS Microcontroller M37640E8-XXXFP Specification

MITSUBISHI ELECTRIC  

Mitsubishi Microcomputer

7600 Series

M37640E8-XXXF Preliminary Specification

2.5 Processor Modes

The operation modes are described below. The memory maps for the first three modes are shown in

Figure 2-15.

Single chip mode is normally entered after reset. However, if the MCU has a CNVss pin, holding this

pin high will cause microprocessor mode to be entered after reset. After the reset sequence has

completed, the mode can be changed with software by modifying the value of bits 0 and 1 of CPMA.

However, while CNVss is high, bit 1 of CPMA is “1” and cannot be changed.

Single Chip Mode

0000

CPMA, CPMB,&

0007

Int Registers

0008

P0-P3

SFR

000F

0010

006F

0070

00FF

0100

046F

0470

Internal RAM

(Zero Page)

Internal RAM

Memory Expansion Mode

0000

CPMA, CPMB,&

0007

Int Registers

0008

External

SFR

000F

Memory

0010

006F

0070

00FF

0100

046F

0470

Internal RAM

(Zero Page)

Internal RAM

Microprocessor Mode

0000

CPMA, CPMB,&

0007

Int Registers

0008

External

SFR

000F

Memory

0010

006F

0070

00FF

0100

046F

0470

Internal RAM

(Zero Page)

Internal RAM

Inaccessible Area

External Memory

7FFF

8000

807F

8080

Reserved Area

ROM

FFC9

FFCA

FFFB

FFFC

FFFF

Interrupt

Vectors

Reserved Area

7FFF

8000

807F

8080

Reserved Area

External Memory

ROM

FFC9

FFCA

FFFB

FFFC

FFFF

Interrupt

Vectors

Reserved Area

FFFF

Figure 2-15. Operation Modes Memory Maps

2.5.1 Single Chip

In this mode, all ports take on their primary function and all internal memory is accessible. Those

areas that are not in internal memory are not accessible. Also, slow memory wait and EDMA are

disabled in this mode.

Processor Modes

7/9/98

2-17

Share Link: