Technical information

32
MITSUBISHI MICROCOMPUTERS
3820 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Fig. 24 Block diagram of LCD controller/driver
Data bus
Timing controller
LCD divider
f(XCIN)
f(X
IN)/ 256
Common
driver
Bias control
Segment
driver
Segment
driver
COM0
COM1 COM
2 COM3
VSS V
L1 VL2 VL3
SEG
3
SEG2
SEG
1
SEG0
Address 004016
Address 004116
“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
SelectorSelector
LCD display RAM
Segment
driver
Segment
driver
Segment
driver
Segment
driver
Address 0053
16
Common
driver
Common
driver
Common
driver
P16/SEG
38
P3
0/SEG16
P17/SEG39
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