PT6553_10 Datasheet, PDF (26/41 Pages) Princeton Technology Corp – LCD Driver IC with Key Input Function

LCD Driver IC with Key Input Function
Interrupt - Based Key Data Acquisition
The interrupt-based key data acquisition flowchart is given below.
CE = [L]
Tel: [phone]
Fax: [phone]
URL: http://www.princeton.com.tw
PT6553
NO
DO = [L]
YES
K ey Data Read
Pr o c es s i n g
Wait for at
Least t8
CE = [L]
NO
DO = [H]
YES
Key Off
PT6553 V1.7
- 26 -
November, 2007