PF135-08
SED1200F
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Wi pera cts
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Dot Matrix LCD Controller Driver
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1/8 or 1/16 Duty Dot Matrix Drive
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20 Character Simultaneous Display
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Built in Character Generator ROM and RAM
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DESCRIPTION
The SED1200F is a dot matrix LCD controller/driver with a built in CG (character generator).
The circuit consists of a CG ROM which contains 160 different characters, 4 words CG RAM, 20 words display
data RAM and logic functions to operate a 20 character display. Additional characters may be used by writing
CG data to the 4 words CG RAM.
The device also contains the resistor array for the LCD power supply. The SED1200F is fabricated Silicon Gate
CMOS process and features very low power dissipation. This makes the device very desirable for applications
in hand held, portable and other battery powered instruments.
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FEATURES
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1/8 or 1/16 duty cycle dot matrix drive
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20 character simultaneous display
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Built in character generator ROM and RAM
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Built in CR oscillator
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Built in resistor array for LCD power supply
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Compatible with 4 or 8 bit microprocessors
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2 kinds of character font
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TTL Compatible
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5脳7+Cursor line or 558 character font
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Power supply
Logic : 2.5V to 5.5V
LCD : 3.5V to 5.5V
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Package ............ SED1200F : QFP1-80pin (plastic)
SED1200D : Die form
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BLOCK DIAGRAM
OSC1 OSC2
CLK
Timing Generator
Input Controller
WR
RD
A0
CS
Oscillator
Timing Generator
Address Counter
Address Counter
Address Controller
Latch
DB0
DB1
DB2
DB3
Instruction
Register
DDRAM
10!2words
(160 bits)
Write/Read
Controller
Common Generator
Common Driver
COM1
COM16
LC Power Supply
CGRAM
CGRAM 5!8 dots!4
(160 bits)
Write/Read Controller
Segment Signal Generator
Data Controller
Segment Driver
SEG1 SEG50
V
SS
V
DD
LC Power Divider
CGROM 160 words
V
LCD
1
1
2
3
4
5
6
