M3806 View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M3806

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

FUNCTIONAL DESCRIPTION

Central Processing Unit (CPU)

The 3806 group uses the standard 740 family instruction set. Re-

fer to the table of 740 family addressing modes and machine in-

structions or the SERIES 740 <Software> User’s Manual for de-

tails on the instruction set.

Machine-resident 740 family instructions are as follows:

The FST and SLW instruction cannot be used.

The STP, WIT, MUL, and DIV instruction can be used.

CPU mode register

The CPU mode register is allocated at address 003B16.

The CPU mode register contains the stack page selection bit.

b7

b0

CPU mode register

(CPUM : address 003B16)

Processor mode bits

b1 b0

0 0 : Single-chip mode

0 1 : Memory expansion mode

1 0 : Microprocessor mode

1 1 : Not available

Stack page selection bit

0 : 0 page

1 : 1 page

Not used (return “0” when read)

Fig. 1 Structure of CPU mode register

MITSUBISHI MICROCOMPUTERS

3806 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

9

Share Link: