326
13.1.2
Block Diagram
Figure 13-1 shows a block diagram of the LCD controller/driver.
Figure 13-1 Block Diagram of LCD Controller/Driver
ø/2 to ø/256
ø
w
CL
2
CL
1
SEG
n,
DO
LPCR
LCR
LCR2
Display timing generator
LCD RAM
(32 bytes)
Internal data bus
32-bit shift
register
LCD drive power supply
(built-in step-up constant-
voltage circuit)
Segment
driver
Common
data latch
Common
driver
M
V
1
V
2
V
3
V
SS
COM
1
COM
4
SEG
32
/CL
1
SEG
31
/CL
2
SEG
30
/DO
SEG
29
/M
SEG
28
SEG
1
Notation:
LPCR: LCD port control register
LCR: LCD control register
LCR2: LCD control register 2
V
0