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M37905M8C

16 BIT CMOS MICROCOMPUTER

Mitsumi 

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MITSUBISHI MICROCOMPUTERS

M37905M4C-XXXFP, M37905M4C-XXXSP

M37905M6C-XXXFP, M37905M6C-XXXSP

M37905M8C-XXXFP, M37905M8C-XXXSP

16-BIT CMOS MICROCOMPUTER

PROCESSOR MODES

This microcomputer is dedicated to the single-chip mode. Therefore,

be sure to connect pin MD0 to Vss, and be sure to fix the processor

mode bits (bits 1 and 0 of the processor mode register 0, address

5E16), which is shown in Figure 11, to “002”.

76 5432 1 0

0

00 00

Processor mode register 0

Processor mode bits

0 0 : Single-chip mode

0 1 : Do not select.

1 0 : Do not select.

1 1 : Do not select.

Fix these bits to “002”.

Address

5E16

Interrupt priority detection time select bits

0 0 : 7 cycles of fsys

0 1 : 4 cycles of fsys

1 0 : 2 cycles of fsys

1 1 : Do not select.

Software reset bit

By a write of “1” to this bit, the microcomputer will be reset, and then, restarted.

Fix this bit to “0”.

Fig. 11 Bit configuration of processor mode register 0

20

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