MSM6665-XX View Datasheet(PDF) - Oki Electric Industry

Part Name

Description

Manufacturer

MSM6665-XX

DOT MATRIX LCD CONTROLLER WITH 17-DOT COMMON DRIVER AND 80-DOT SEGMENT DRIVER

Oki Electric Industry 

¡ Semiconductor

MSM6665-xx

FUNCTIONAL DESCRIPTION

Pin Functional Description

• SI (Serial Input)

Input pin for inputting serially commands and display data in an 8-bit unit.

"H"="1" and "L"="0".

When CS pin is at "H" level, read-in is executed by the leading edge of SHT.

Whether input data is a command or data is determined by selecting a C/D level at the

8th leading edge of SHT.

The input data is a command if C/D="H", and display data if C/D="L".

• C/D (Command/Data)

Input pin for determining whether input data for SI pin is a command or display data.

Read-in is executed by the 8th leading edge of SHT. The input data is a command if C/

D="H", and display data if C/D="L".

• SHT (Shift Clock)

Clock input pin for reading-in SI input and C/D input.

Read-in is executed by the clock leading edge. Read-in operation is complete with 8

clocks. Inputting data during BUSY may cause malfunction.

Valid if CS pin is at "H" level.

• SO (Serial Out)

Serial output pin for reading-out BUSY/NON-BUSY and display data. "H"="1" and

"L"="0". If CS pin is at "H" level and Serial Out Enable is set with the command, output

is executed. Otherwise, this pin becomes high impedance.

BUSY/NON-BUSY is output when CS pin is at "H" level. BUSY if "L" and NON-BUSY

if "H". It goes BUSY after the 8th leading edge of SHT, then goes NON-BUSY

automatically after a specified time.

Display data is output synchronously with the leading edge of SHT.

Input the "SOE/D" instruction to set this output to serial out enable or a high impedance

state because the pin status is undefined after the power is applied.

• CS (Chip Select)

Chip Select input pin.

"Chip Select ON" if CS pin is at "H" level, and "Chip Select OFF" at "L" level. When "L"

level is input, SO pin becomes open and SHT pin becomes equivalent to "H" level inside

of the IC. Moreover, it prevents the input stages of SI, C/D and SHT pins from current

flowing.

* For SI, C/D, SHT, SO, and CS, refer to "I/O Procedure".

• RST

Direct input reset input pin.

By inputting "L" level pulse into RST pin, DISP, ABBC1/5, ABB, and BPC commands are

set as D0="0". Before turning on the power, be sure to set RST pin at "L" level once. Setting

this pin at "L" level during command execution may cause malfunction.

• 9D/17D (1/9Duty/1/17Duty)

Duty setting input pin.

1/9 duty is set if this pin is at "H" level, and 1/17 duty at "L" level. Choice depends on

the type of panel to be used.

8/30

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