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HD44780 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics
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HD44780
Dot Matrix Liquid Crystal Display Controller/Driver
Hitachi -> Renesas Electronics
HD44780 Datasheet PDF : 60 Pages
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HD44780U Block Diagram
HD44780U
OSC1 OSC2
CL1
CL2
Reset
M
circuit
ACL
CPG
Timing
generator
Instruction
7
register (IR)
8
MPU
RS
inter-
R/W
face
E
Instruction
decoder
Display
data RAM
(DDRAM)
80
×
8 bits
D
16-bit
shift
register
Common
signal
driver
COM1 to
COM16
Address
7
DB4 to
counter
8
7
DB7
7
Input/
8
Data
8
DB0 to
output
register
DB3
buffer
(DR)
8
8
Busy
flag
40-bit
shift
register
40-bit
latch
circuit
Segment
signal
driver
SEG1 to
SEG40
40
LCD drive
voltage
selector
GND
V
CC
Character
generator
RAM
(CGRAM)
64 bytes
Character
generator
ROM
(CGROM)
9,920 bits
Cursor
and
blink
controller
5
5
Parallel/serial converter
and
attribute circuit
V1 V2 V3 V4 V5
3
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