lc75853nw Sanyo Semiconductor Corporation, lc75853nw Datasheet - Page 23

• Manufacturer Part Number: lc75853nw
• Description: 1/3 Duty Lcd Display Drivers With Key Input Function
• Manufacturer: Sanyo Semiconductor Corporation

2. Interrupt based key data acquisition
• Flowchart
• Timing chart
t3: Key scan execution time when the key data agreed for two key scans. (615 T (s))
t4: Key scan execution time when the key data did not agree for two key scans and the key scan was executed again. (1230 T (s))
t5: Key address (43H) transfer time
t6: Key data read time
Key input
Key scan
T =
f
OSC
1
Controller determination
(key on)
Key
address
Key data read request
Key data read
Controller determination
(key off)
LC75853NE, 75853NW
Controller determination
Key data read
processing
Wait for at
(key on)
least t8
Controller determination
(key on)
Controller determination
(key on)
Controller determination
(key off)
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