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參數(shù)資料
| 型號： | AS2591 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | 16-Digit LCD Driver CMOS Integrated Circuit |
| 中文描述： | LIQUID CRYSTAL DISPLAY DRIVER, PQFP44 |
| 封裝： | TQFP-44 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 74K |
| 代理商： | AS2591 |
Preliminary
AS2591
Rev. 1.0
Page 1
May 1999
Key Features
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16-digit LCD driver on a 44 pin CMOS chip
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Operating voltage range: 3.2 to 4.8V
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Low power consumption: max. 150 μA
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Driving 7-segment displays with up to 16 digits and
12 symbols
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Option for 12 digits
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Buffer for 32 digits
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4 backplanes
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2-wire interface
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On chip timer for showing elapsed time
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Contrast adjustable
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On chip oscillator using 32.768 kHz crystal
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Compatible with AS2525
Block Diagramme
General Description
The AS2591 is a CMOS integrated circuit for driving a
liquid crystal display intended for use in telephones.
The driver can be used with 12- or 16-digit LCDs.
The 2-wire serial interface is compatible with the
AS2525, single-chip handsfree telephone circuit.
The device is designed for LCDs with 4 backplanes
and 24 or 31 segments providing 12 or 16 7-segment
digits and 12 symbols.
The AS2591 also includes a timer for showing
elapsed time in minutes and seconds.
The contrast can be adjusted through the serial
interface.
Package
Available in 44 pin TQFP.
SERIAL
I/F
7-
SEGMENT
DECODER
DIGIT
MEMORY
32 DIGITS
COMMAND
DECODER
BACKPLANE
COUNTER
ELAPSE
TIME
COUNTER
TIMER
POR
OSC
CONTRAST
VOLTAGE
CONTROL
4
16
16
LCD
S
M
V
DD
DI
SCLK
CS
V
LCD
32.768 kHz
AS2591
DATA
ADDRESS
CONTROL
COM1-4
S1_n
S2_n
Figure 1: Block diagram
Austria Mikro Systeme International AG
16-Digit LCD Driver
CMOS Integrated Circuit
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