LC75886PW Datasheet, PDF (34/36 Pages) ON Semiconductor – 1/4 and 1/3-Duty LCD Display Driver

LC75886PW
Timing Chart of 4 Line Type and 3 Line Type CCB Format
1. Timing chart of 4 line type CCB format
<Example 1>
Key input
Key off
Key on
Key scan
CE
DI
CCB address
(42H)
CCB address CCB address
(42H)
(42H)
Key scan execution
*21
Key scan execution
*21
CCB address
(43H)
DO
<Example 2>
Key input
Serial data input
(Display and control data transfer)
Key off
Key on
Key data read
request
Serial data output
(Key data read)
Key data read
request
Key off
Key on
Key scan
CE
DI
Key scan execution *21
CCB address
(42H)
CCB address CCB address
(42H)
(42H)
Key scan execution
*21
CCB address
(43H)
CCB address
(43H)
DO
Serial data input
(Display and control
data tranfer)
Key data read
request
<Example 3>
Key input ^{Key off}
Serial data output
(Key data read)
Key data read
request
Serial data output
(Key data read)
Key on
Key off
Key scan
CE
DI
Key scan execution
*21
CCB address
(42H)
Key scan execution
*21
CCB address CCB address CCB address
(42H)
(42H)
(43H)
CCB address
(43H)
DO
Key data read
request
Serial data input
(Display and control
data transfer)
Serial data output
Serial data output
(Key data read) Key data read (Key data read)
request
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
No.A1391-34/36