LC75886PW Datasheet, PDF (35/36 Pages) ON Semiconductor – 1/4 and 1/3-Duty LCD Display Driver

2. Timing chart of 3 line type CCB format
<Example 1>
Key input
Key off
LC75886PW
Key on
Key scan
CE
DI/DO
CCB address
(42H)
CCB address CCB address
(42H)
(42H)
Key scan execution
*21
Key scan execution
*21
CCB address
(43H)
Data communication
start command
<Example 2>
Key input
Key off
Serial data input
(Display and control
data transfer)
Key on
Data communication
stop command
Data
communication
start command
Key data read
request
Serial data
output
(Key data
read)
Key data read
request
Key off
Key on
Key scan
CE
DI/DO
Key scan execution *21
CCB address
(42H)
CCB address CCB address
(42H)
(42H)
Key scan execution
*21
CCB address
(43H)
CCB address
(43H)
Data communication
start command
Serial data input
(Display and control
data transfer)
Data Data
communication communication
stop command start command
Key data read
request
Serial data Data
output
communication
(Key data
start command
read)
Key data read
request
Serial data
output
(Key data
read)
<Example 3>
Key input ^{Key off}
Key on
Key off
Key scan
CE
DI/DO
Key scan execution
*21
CCB address
(42H)
Key scan execution
*21
CCB address CCB address CCB address
(42H)
(42H)
(43H)
CCB address
(43H)
Data
communication
start command
Key data read
request
Serial data input
(Display and control
data transfer)
Serial data
Data
output
communication
(Key data
start command
read) _{Key data read}
request
Serial data
output
(Key data
read)
Note: *21. When the key data agrees for two key scans, the key scan execution time is 615T[s].
And, when the key data does not agree for two key scans and the key scan is executed
again, the key scan execution time is 1230T[s].
1
1
T= _fOSC = _fCK
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