pt6584 Princeton Technology Corp., pt6584 Datasheet - Page 28

• Manufacturer Part Number: pt6584
• Description: Lcd Driver Ic - Princeton Technology Corp
• Manufacturer: Princeton Technology Corp.

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