M37207M8-059SP datasheet(117/121 Pages) MITSUBISHI

117 / 121 page

117

MITSUBISHI MICROCOMPUTERS

M37207MF-XXXSP/FP, M37207M8-XXXSP

M37207EFSP/FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER

and ON-SCREEN DISPLAY CONTROLLER

CRT Clock Selection Register

CRT Control Register 2

Address 020816

Address 020916

b7 b6 b5 b4 b3 b2 b1 b0

CRT control register 2 (CBR) [Address 020816]

Name

Functions

After reset

R W

CRT Control Register 2

I signal output switch bit

(CBR0)

0: I signal output

1: MUTE signal output

I/TIM1 function switch bit

(CBR1)

Nothing is assigned. These bits are write disable bits.

When these bits are read out, the values are indeterminate.

R—

0: I output or MUTE output

1: 1/2 clock ouput of timer 1

b7 b6 b5 b4 b3 b2 b1 b0

CRT clock selection register (OP) [Address 020916]

Name

Functions

After reset R W

CRT Clock Selection Register

0, 1 CRT clock

selection bits

(OP0, OP1)

Since the main clock is used as the clock for

display, the oscillation frequency is limited.

Because of this, the character size in width

(horizontal) direction is also limited. In this

case, pins OSC1 and OSC2 are also used

as input ports P70 and P71 respectively.

The clock for display is supplied by connecting the

following across the pins OSC1 and OSC2.

• a ceramic resonator only for CRT display and a feedback resistor

• a quartz-crystal oscillator only for CRT display and a feedback

resistor (See note)

The clock for display is supplied by connecting RC

or LC across the pins OSC1 and OSC2.

Functions

CRT oscillation

frequency

= f(XIN)

Notes 1: It is necessary to connect other ceramic resonator or quartz-crystal oscillator across the pins XIN and XOUT.

2: CC6 is the scnanning line double count mode flag.

R—

CC6

CC6 =

“0” or “1”

CC6 = “0”

0—

Do not set.

Fix this bits to “0.”

Nothing is assigned. These bits are write disable bits.

When these bits are read out, the values are “0.”

M37207M8-059SP Datasheet(PDF) 117 Page - Mitsubishi Electric Semiconductor

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