MSM5259 datasheet(10/18 Pages) OKI

10 / 18 page

MSM5259

¡ Semiconductor

10/18

FUNCTIONAL DESCRIPTION

Pin Functional Description

•DI1

The data (1st to 20th bit) from the LCD controller LSI is input to 20-bit shift register from DI1.

(Positive logic)

•DI21

Data input to the shift register (21st to 41st bit).

Connecting DO20 and DI21 allows configuration of a 40-bit register.

If DI21 is not used, connect this pin to VSS.

•CP

Clock pulse input pin for the two 20-bit shift registers. The data is input to the 20-bit shift

(tHOLD) are required between the DI1 and DI21 signals and a clock pulse.

•DO20

20th bit of the shift register contents is output from DO20. The data which was input from DI1

is output from this pin with a delay of the number of bits of the shift register (20), synchronized

with the clock pulse. By connecting DO20 to DI21, two 20-bit shift registers can be used as a

40-bit shift register.

•DO40

40th bit of the shift register contents is output from DO40. The data which was input from DI21

is output from this pin with a delay of the number of bits of the shift register (20), synchronized

with the clock pulse. By connecting DO40 to the next MSM5259’s DI1, this LSI is applicable

to a wide screen LCD.

Refer to the application circuit.

•DF

Alternate signal input pin for LCD driving.

• LOAD

Signal for latching the shift register contents is input from this pin. When the LOAD pin is

set at "H" level, the shift register contents are transferred to the 40-bit 4-level driver. When

LOAD pin is set at "L" level, the last display output data (O1 - O40), which was transferred

when LOAD pin was at "H" level, is held.

•VDD, VSS

Supply voltage pins.

VDD is generally set to 4.0 to 6.0V. VSS is a ground pin (VSS = 0V)

•V2, V3, V5

Bias supply voltage pins to drive the LCD. Bias voltage divided by the register is usually used

as supply voltage source.

Refer to the application circuit.

For static operation, connect V3 to VDD and also connect V2, V5, to VSS.

MSM5259 Datasheet(PDF) 10 Page - OKI electronic componets