Renesas PCA4738F-80A Manual de usuario Pagina 29

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28
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C3 Group
Fig. 28 Block diagram of LCD controller/driver
Data bus
Timing controller
LCD
divider
f(X
CIN
)/32
f(X
IN
)/8192
(f(X
CIN
)/8192 in low-speed mode)
Common
driver
Bias control
COM
0
COM
1
COM
2
COM
3
V
SS
V
L1
V
L2
V
L3
P2
3
/SEG
3
P2
2
/SEG
2
P2
1
/SEG
1
P2
0
/SEG
0
Address 0040
16
Address 0041
16
“1”
“0”
LCDCK
LCDCK count source
selection bit
LCD circuit
divider division
ratio selection bits
Bias control bit
LCD enable bit
Duty ratio selection bits
2
2
Selector Selector Selector Selector
Selector
Selector
LCD display RAM
Address 004F
16
P3
6
/SEG
30
P0
4
/SEG
12
P3
7
/SEG
31
Segment
driver
Segment
driver
Segment
driver
Segment
driver
Segment
driver
Segment
driver
Common
driver
Common
driver
Common
driver
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