MSM6648 View Datasheet(PDF) - Oki Electric Industry

Part Name

Description

Manufacturer

MSM6648

100-DOT COMMON DRIVER

Oki Electric Industry 

¡ Semiconductor

MSM6648

FUNCTIONAL DESCRIPTION

Pin Functional Description

• IO, IO50, IO51, IO100

These are I/O pins for the two 50-bit bidirectional shift registers.

• SHL

This is an input pin to select the shift direction of the two 50-bit bidirectional shift registers.

Set this pin to "H" or "L" level during power-on.

• MODE1, MODE2

These are input pins to select whether the two 50-bit shift registers are used as a two 50-bit

application or a 40-bit and 50-bit application.

Functions of the SHL, MODE1 and MODE2 pins are shown below.

Scan

Data Scan

SHL MODE1 MODE2

direction input pin output pin

Function

L

—

H

L

O1 Æ O50

IO1

L

O51 Æ O100 IO51

O50 Æ O1

IO50

—

O100 Æ O51 IO100

IO50

IO100

IO1

IO51

The scan data input into the IO1, and IO51 pins are

shifted at the falling edge of CP and are output from the

IO50 and IO100 pins after the lapse of 50 clock pulses.

The scan data input into the IO100 and IO50 pins are

shifted at the falling edge of CP and are output from the

IO51 and IO1 pins after 50 clock pulses.

This condition means a mode of bypassing between the

L

—

O11 Æ O50

IO1

H

O51 Æ O100 IO51

IO50

IO100

O1 and O10 pins. The scan data input into the IO1 pin is

stored in the O11 pin and is output from the IO50 pin

after 40 clock pulses. The operation in the O51 to O100

pins is the same as that in setting SHL to "L" and MODE2

to "L".

This condition means a mode of bypassing

H

H

O50 Æ O1

IO50

—

O90 Æ O51 IO100

IO1 between the O91 and O100 pins. The scan data

input into the IO100 pin is stored in O90 and is

output from the IO51 pin after 40 clock pulses.

IO51 The operation in the O1 to O50 pins is the same as

that in setting SHL to "H" and MODE1 to "L".

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