PT6584 Datasheet, PDF (28/42 Pages) Princeton Technology Corp – LCD Driver IC

LCD Driver IC
INTERRUPT BASED KEY DATA ACQUISITION
• FLOWCHART
CE= L
DO=L
NO
YES
K ey data read
p ro c e s si n g
Wait for at least t10
CE= L
NO
DO=H
YES
K ey off
Tel:[phone]
Fax:[phone]
URL:http://www.princeton.com.tw
PT6584
• Timing Chart
Key Input
Key on
Key on
Key S can
CE
DI
DO
t5
t8
Ke y a ddress
t7
Ke y d ata rea d
t5
t6
t5
t8
t8
t7
t7
t8
t7
Ke y d ata rea d requ est
Co ntro ller
de term inat ion
(key on )
t10
Co ntr o ller
de term inat ion
(key off )
Co ntr o ller
de term inat ion
(key on )
t10
Co ntr o ller
de term inat ion
(key on )
t10
Co ntr o ller
de term inat ion
(key on )
t10
Co ntr o ller
de term inat ion
(key off )
t5 : Key scan execution time when the key data agreed for two key scans. (800T(s))
t6 : Key scan execution time when the key data did not agree for two key scans and the key scan
was executed again. (1600T(s))
t7 _{: Key address (43H) transfer time T =} 1
fosc
t8 : Key data read time
PT6584 V1.1
- 28 -
August, 2006