Renesas H8S Series User Manual page 6

(2) Block Diagram of LCD Controller/Driver
A block diagram of the LCD controller/driver used in this sample task is shown in figure 2.
/16 to /2048
sub to sub/4
LCD controller/
driver function settings
Display data
REJ06B0486-0100/Rev.1.00
LCD Display Using 1/4 Duty Drive (LCD Controller/Driver)
Selector
LPCR
LCR
LCR2
Display timing
generator
LCD RAM
20 bytes
Figure 2 Block Diagram of LCD Controller/Driver
March 2005
LCD controller/driver
LCD drive power
supply (built-in
step-up voltage
Common
data latch
40-bit
shift register
[Legend]
LPCR: LCD port control register
LCR: LCD control register
LCR2: LCD control register 2
H8S Family
Vcc
V1
V2
V3
circuit)
Vss
COM1
Common
driver
COM4
SEG40
Segment
driver
SEG1
Page 4 of 19