PT6530 Datasheet, PDF (36/42 Pages) Princeton Technology Corp – LCD Driver IC

6.17.2 INTERRUPT BASED KEY DATA ACQUISITION
FLOWCHART
PT6530
TIMING CHART
t5: Key scan execution time when the key data agreed for two key scans. (615T(s))
t6: Key scan execution time when the key data did not agree for two key scans and the key scan was executed again.
(1230T(s))
t7: Key address (43H) transfer time
T
=
1
fosc
t8: Key data read time
V1.3
36
June 2010