HD66727 Datasheet, PDF (6/97 Pages) Hitachi Semiconductor – Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function

HD66727
HD66727 Block Diagram
OSC1 OSC2
EXM AGND
RESET*
TEST
LED0–
LED2
PORT0–
PORT2
IM
ID0
ID1/CS*
SCL
SDA
KIN0–
KIN3
KST0–
KST7
CPG
Instruction register
(I R)
Instruction
decoder
LED
output
port
8
Address
counter
(AC)
Serial
interface
• I2C bus
Busy
flag
• Clock
(BF)
synchro-
nized
serial
4
8 _Data
register
(DR)
6
3
Key scan
registers
(SCAN0–SCAN7)
Segmemt
Key scan
timing
controller
RAM
(SGRAM)
8 bytes
7
8
66
Character
generator
RAM
(CGRAM)
32 bytes
Timing generator
7
Annunciator
driver
ASEG1–
ASEG12
ACOM
Display data
RAM
(DDRAM)
60 x 8 bits
34-bit bidirectional _{COM1/32–}
common shift register _COM32/1
Common
driver
COMS1/2
8
60-bit
segment
shift
register
60-bit
latch
circuit
SEG1/60–
Segment ^SEG60/1
driver
8
Character
generator
ROM
(CGROM)
11,520 bits
Cursor and
blink
controller
LCD drive
voltage
selector
Vci
C1
C2
V5OUT2
V5OUT3
Double/triple
booser
6
6
Parallel/serial converter
V_CC
GND
+–
+–
+–
+–
+–
R
R
2R
R
R
VR
OPOFF
VREF
VREFP
VREFM
V1OUT _V2 V2OUT _V3 V3OUT V4OUT
V5OUT
V_EE
6