Datasheet

Table Of Contents
Section 21 LCD Controller/Driver
Rev. 2.00 Jul. 04, 2007 Page 456 of 692
REJ09B0309-0200
Figure 21.1 shows a block diagram of the LCD controller/driver.
φ/2 to φ/256
φ
w
, φ
w
/2, and φ
w
/4
SEGn (n = 1 to 40)
LPCR
LCR
LCR2
Display timing generator
LCD RAM
20 bytes
Internal data bus
40-bit
shift
register
LCD drive
power supply
(On-chip 3-V
constant-voltage
power supply circuit)
Segment
driver
Common
data latch
Common
driver
V1
C1
C2
V2
V3
Vss
COM1
COM4
SEG40
SEG39
SEG38
SEG37
SEG36
SEG1
[Legend]
LPCR:
LCR:
LCR2:
LTRMR:
BGRMR:
Vcc
LTRMR
BGRMR
LCD port control register
LCD control register
LCD control register 2
LCD trimming register
BGR control register
Figure 21.1 Block Diagram of LCD Controller/Driver