GDM12864A View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

GDM12864A

Liquid Crystal Display Module

Unspecified 

64CH Segment Driver For Dot Matrix LCD 17

RS R/W Function

LL

Instruction

H

Status read (busy check)

HL

Data write (from input register to display data RAM )

H

Data read (from display data RAM to output register)

4. Reset

The system can be initialized by setting RSTB terminal at low level when turning power on, receiving

instruction from MPU. When RSTB becomes low, following procedure is occurred.

1. Display off

2. Display start line register become set by 0.(Z-address 0)

While RSTB is low, No instruction except status read can by accepted. Therefore, execute other

instructions after making sure that DB4= (clear RSTB) and DB7=0 (ready) by status read instruction.

The conditions of power supply at initial power up are shown in table 1.

Table 1. Power Supply Initial Conditions

Item

Symbol Min Typ Max Unit

Reset Time tRS

Rise Time tR

1.0 -

-

-

-

us

200 ns

4.5[V]

VDD

tRS

RSTB

tR

0.7VDD

0.3VDD

5. Busy flag

Busy flag indicates that KS0108B is operating or no operating. When busy flag is high, KS0108B is in

internal operating .

When busy flag is low, KS0108B can accept the data or instruction.

DB7indicates busy flag of the KS0108B.

E

Busy Flag

T Busy

1/fCLK<T Busy<3/fCLK

fCLK is CLK1, CLK2 Frequency

© 1998 Intech LCD Group Ltd.

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