M37478E8FP datasheet(8/47 Pages) MITSUBISHI

Part #	M37478E8FP

Description	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER ???

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Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

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MITSUBISHI MICROCOMPUTERS

7477/ 7478 GROUP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

CPU Mode Register

The CPU mode register is allocated at address 00FB16.

This register contains the stack page selection bit.

FUNCTIONAL DESCRIPTION

Central Processing Unit (CPU)

The 7477/7478 group uses the standard 740 family instruction set.

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

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

details on the instruction set.

Machine-resident 740 family instructions are as follows:

The FST and SLW instruction cannot be used.

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

Fig. 1 Structure of CPU mode register

CPU mode register (Address 00FB 16)

b7

b0

Stack page selection bit (Note 1)

0 : In page 0 area

1 : In page 1 area

These bits must always be set to “0”.

P50, P51/XCIN, XCOUT selection bit (Note 2)

0 : P50, P51

1 : XCIN, XCOUT

Notes 1 : In the M37477M4-XXXSP/FP, M37478M4-XXXSP/FP, set this bit to “0”.

2 : In the 7477 group, set this bit to “0”.

XCOUT drive capacity selection bit (Note 2)

0 : Low

1 : High

Clock (XIN-XOUT) stop bit (Note 2)

0 : Oscillates

1 : Stops

Internal system clock selection bit (Note 2)

0 : XIN-XOUT selected (normal mode)

1 : XCIN-XCOUT selected (low-speed mode)

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M37478E8FP Datasheet(PDF) 8 Page - Mitsubishi Electric Semiconductor

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