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KX-F910BX
CIRCUIT OPERATION
LCD UNIT
ENABLE
D4-D7
RESET
R/W
V
0
(COG TYPE)
C316
R320
R322
IC301
LED7
4
11. LCD COG TYPE
The Gate Array (IC301) needs only write ASCII code from the data bus (D4~D7). V0 is power supplies for crystal drive.
R320, R322 are density control resistors.
Consequently, in this set the timing (mainly positive clock) is generated by the LCD interface circuitry of the gate array
(IC301).
Circuit Diagram
Timing Chart
DATA
R/W
E
DB4~DB7
Density
LED 7
(IC301-4 pin)
Normal
Dark
H
L
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