PT6332 Datasheet, PDF (26/37 Pages) Princeton Technology Corp – VFD Driver/Controller IC

VFD Driver/Controller IC
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URL: http://www.princeton.com.tw
PT6332
CONTROLLER KEY DATA READOUT PROCEDURE
WHEN THE CONTROLLER USES A TIMER TO READ OUT THE KEY DATA
• Flowchart
CE=L
NO
DO=L
YES
Key data read
processing
• Timing Chart
Key Input
Key on
Key on
Key S can
t5
t6
t5
CE
t8
t8
DI
DO
t7
t7
Ke y d ata rea d
t5
t8
t7
Ke y d ata rea d requ est
t9
t9
t9
t9
Co ntr olle r d ete r mina tion Co ntrolle r d ete rmina tion
(key on )
(key on )
Co ntr olle r d ete r mina tion
(key off )
Co ntr olle r d ete rmina tion Co ntrolle r d ete rmina tion
(key on )
(key off )
t5 - Key scan execution time (38400T [s]) when the key data for two key scan operations matches.
t6 - Key scan execution time (76800T [s]) when the key data for the first two key scan operations
does not match.
t7 - Key address (8F_H) transfer time
t8 - Key data readout time
PT6332 V1.0
- 26 -
February, 2006