MSM9005 データシートの表示（PDF） - Oki Electric Industry

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MSM9005

DOT MATRIX LCD CONTROLLER WITH 8-DOT COMMON DRIVER AND 65-DOT SEGMENT DRIVER

Oki Electric Industry 

¡ Semiconductor

FEDL9005-03

MSM9005-xx

How to Read Display Data

• Display data is output sequentially from MSB in 8-bit units (MSB first).

• Setting S = "1" by the SOE/D command after setting the CS pin at "H" level enables the output

of display data from the SO pin.

• Setting the CS pin at "L" level or setting S = "0" by the SOE/D command sets the SO pin to high

impedance and disables output of display data.

• CGARAM or ABRAM data corresponding to the address pointer value is output.

• Display data is output from MSB on the falling edge of the shift clock that is input to the SHT

pin, as shown in the figure below.

Read timing is shown below.

(Example) Reading by AINC command The wait time of 21 × 1/fOSC is required

CS

C/D

SI

SHT

Address

pointer

SO

21 x 1/fOSC WAIT

21 x 1/fOSC WAIT

Don't Care

Don't Care

Don't Care

1 1 * 0 0 0 01

SOE/D command

100*1*1*

AINC command

100*1*1*

AINC command

00h

"HZ"

01h

0

0

0

RD4

RD3

RD2

RD1

RD

0

MSB

LSB

Display data at address

00h of CGA RAM

0

0

0

RD4

RD3

RD2

RD1

RD

0

MSB

LSB

Display data at address

01h of CGA RAM

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