M66273FP datasheet(8/34 Pages) MITSUBISHI

8 / 34 page

LCD CONTROLLER with VRAM

M66273FP

MITSUBISHI <DIGITAL ASSP>

Ver.3.1 Dec,1999

Address is listed for ICOS control. Incase of MCS control,set to address adding 50H to upper 7 bit (50**H).

(2) Description of registers

[R1] Basi c operation mode

000

R/W

Address

R/W

Function

Reset

RESET

Reset OFF

Reset ON

·Software reset.

IDXON

Index mode OFF

Index mode ON

·Set to decide whether or not the function only for LCD

module built-in system is used.

·Set Index mode OFF for reset.

DIV

Division of

MPUCLK input

1/2 division

1/4 division

1/8 division

1/16 division

·Set the division of MPUCLK input to set the

reference clock cycle (MAINCLK) for internal

operation.

·Resetting does not divide MPUCLK.

·Control display ON/OFF of LCD.

·In the reverse mode with REV (D1) set to "1", "1" is output to

display data VD<n:0> with DISP="0".

·Reset sets display OFF.

DISP

Display OFF

Display ON

·Sets the data output from the LCDENB output pin.

·Resetting outputs "0" (Vss potential) to the LCDENB output pin.

00H

Set the Basic operation mode

Restriction

·Surely return to reset

off after reset on.

·Don't set except for the

settings in the table at

left.

REV

Normal display

Reverse display

·Controls normal/reverse of LCD display.

·Resetting sets normal display.

LCDE

LCDENB="0"output

LCDENB="1"output

·This function is prepared for controlling the apply voltage to LCD.

When the power supply is turned ON after registers have been

completely set, set this LCDE to "1" to apply the LCD voltage.

Conversely for turning OFF the power supply to the system, set

the LCDE to "0" to turn OFF the LCD voltage.

This prevents abnormal DC voltage from being applied to the

LCD.

This function depends on the LCD functions.

Use the function, if necessary.

And then, can't set

another bits (D6 to

D0) at the same time.

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