PT6552 driver equivalent, 1/2 duty lcd driver.
* Up to 4 general purpose output ports
* Up to 90 segments outputs
* Up to 30 key inputs (Key scan is only performed
when a key is pressed)
* ½ duty - ½ b.
* Cellular phone
* Data bank, organizer
* Electronic dictionary/translator
* P.D.A.
* P.O.S.
* I.
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