M37207M8-059SP datasheet(100/121 Pages) MITSUBISHI

100 / 121 page

100

MITSUBISHI MICROCOMPUTERS

M37207MF-XXXSP/FP, M37207M8-XXXSP

M37207EFSP/FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER

and ON-SCREEN DISPLAY CONTROLLER

Structure of Register

The figure of each register structure describes its functions, contents

at reset, and attributes as follows:

Values immediately after reset release

Bit attributes

(Note 1)

(Note 2)

Bits

2: Bit attributes••••••The attributes of control register bits are classified into 3 types : read-only, write-only

and read and write. In the figure, these attributes are represented as follows :

: Bit in which nothing is assigned

Notes 1: Values immediately after reset release

0••••••“0” after reset release

1••••••“1” after reset release

?••••••Indeterminate after reset release

••••••Read enabled

••••••Read disabled

R••••••Read

••••••Write enabled

••••••Write disabled

••••••“0” can be set by software, but “1”

cannot be set.

W••••••Write

b7 b6 b5 b4 b3 b2 b1 b0

After reset RW

CPU Mode Register

0, 1

3, 4

Name

Functions

Processor mode bits

(CM0, CM1)

0 0: Single-chip mode

0 1:

1 0:

Not available

1 1:

Fix these bits to “1.”

Stack page selection

bit (Note) (CM2)

b1 b0

0: 0 page

1: 1 page

Nothing is assigned. This bit is write disable bit.

When this bit is read out, the value is “0.”

6, 7

Clock switch bits

(CM6, CM7)

0 0: f(XIN) = 8 MHz

0 1: f(XIN) = 12 MHz

1 0: f(XIN) = 16 MHz

1 1: Do not set

b7 b6

CPU mode register (CPUM) (CM) [Address FB16]

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