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MSM5839B

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FUNCTIONAL DESCRIPTION

Pin Functional Description

The data input pin for the 20-bit shift register (from 1st to 20th bit). The display data is input

to the data pin in synchronization with a clock pulse.

•CP

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

The 20th output bit of the shift register.

register (20). A 40-bit shift register can be configured by connecting the output of this pin to

The data input pin for the 20-bit shift register (from 21st to 40th bit).

The 40th output bit of the shift register.

shift register (20).

When extending the number of characters, this pin is used to cascade connect the next

MSM5839B.

•DF

Alternate signal input pin for LCD driving waveform.

Bias supply voltage pins to drive the LCD. Bias voltage is supplied from an external source.

• LOAD

The signal for latching the shift register contents is input from this pin.

When LOAD pin is set at "H", the shift register contents are transferred to the 40-bit 4-level

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