CHAPTER 3 LCD CONTROLLER/DRIVER
User’s Manual U18438EJ2V0UD
19
Internal bus
LCDC3 LCDC2 LCDC1 LCDC0
2
2
Prescaler
LCD
clock
selector
selector
LCD clock control
register (LCDC)
VLCON
LCDM2
LCD display mode
register (LCDM)
Segment
driver
Common driver
COM0 COM1 COM2 COM3
3 2 1 0
3 2 1 0
6 5
7
4
LCDSEG's 00H
LCDON
Segment
driver
3 2 1 0
6 5
7
4
LCDSEG's 23H
S35
S0
- - - - - - - - - -
selector
3 2 1 0
LCDON
LCDCL
LCDM1
GAIN
LCD voltage boost control
register 0 (VLCG0)
CAPH CAPL
-------
-------
-------
-------
-------
-------
-------
Timing
controller
VLCON
LCDM0
CTSEL1 CTSEL0
LCDON
SCOC
SEGSET0 MDSET1
LCD mode setting
register (LCDMD)
MDSET0
SEGSET2 SEGSET1
LCD drive voltage controller
2
3
Selector
Clock
generator for
boosting
Booster
circuit
Common voltage
controller
Segment voltage
controller
Display data memory
Display data memory
Figure 3-2. Block Diagram of LCD Controller/Driver
Note
64-pin product only.
-------
selector
Segment
driver
3 2 1 0
3 2 1 0
6 5
7
4
LCDSEG's 24H
LCDON
Segment
driver
3 2 1 0
6 5
7
4
LCDSEG's 27H
S39
Note
S36
Note
- - - - - - - - - -
selector
3 2 1 0
LCDON
-------
-------
-------
-------
-------
-------
-------
-------
f
LCD
2
6
f
LCD
2
7
f
LCD
2
8
f
LCD
2
9
V
LC0
f
LCLK
f
LCLK
/2
f
LCLK
/2
2
f
LCD
V
LC2
V
LC1