HD66724 Datasheet, PDF (8/117 Pages) Hitachi Semiconductor – (Graphics LCD Controller/Driver with Key Scan Function)

HD66724/HD66725
HD66724/HD66725 Block Diagram
R1-R3 _{OSC1 OSC2}
RESET*
TEST
CPG
Timing generator
PORT0 –
PORT2
IM2–1
IM0/ID
CS*
RS
E/WR*/SCL
RW/RD*/SDA
DB0/KIN0–
DB7/KIN7
KST0–
KST3
Vci
C1+
C1–
C2+
C2–
VLOUT
Instruction register
Instruction
7
(IR)
decoder
General
output
8
port
Address
counter
(AC)
System
interface
• Clock
synchro-
nized
serial
8
• 4-bit bus
Data
register
• 8-bit bus
(DR)
8
6
7
Key scan
registers
(SCAN0–SCAN3)
Segmemt
Key scan
timing
controller
RAM
(SGRAM)
24 bytes
7
8
10 ⁸
Character
generator
RAM
(CGRAM)
384 bytes
Display data
RAM
(DDRAM)
80 bytes
26-bit bidirectional _{COM1/24–}
common shift register _COM24/1
Common
driver
COMS1/2,
COMS2/1
8
Segment
shift
register
Latch
circuit
SEG1/72 (96)–
Segment ^{SEG72 (96)/1}
driver
8
Character
generator
ROM
(CGROM)
20,736 bits
Cursor and
blink
controller
LCD drive
voltage
selector
Double/triple
booster
6
6
Parallel/serial converter
Vcc
V_LCD
+-
+-
+-
+-
+-
VR
R
R
R₀
R
R
OPOFF
V1OUT
V2OUT V3OUT V4OUT V5OUT _GND
8