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參數(shù)資料
| 型號(hào)： | AS2591 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 顯示驅(qū)動(dòng)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)： | 6/10頁 |
| 文件大?。?/td> | 74K |
| 代理商： | AS2591 |
Preliminary
AS2591
Rev. 1.0
Page 6
May 1999
LCD Symbols
Each symbol is associated with a fixed digit address. The circuit has 12 symbols implemented associated with the
lower 12 addresses.
Table 1: Symbol Overview
Enabled
Address
Name
Description
Always
y0
KL
Key lock activated
Optional
y1
SP
Loudspeaker on
Always
y2
MT
Mute activated
Optional
y3
MF
DTMF dialling mode selected
Optional
y4
LD
Loop disconnect (pulse) dialling mode selected
Optional
y5
Vol
Volume control keys activated. Remains on 2 seconds after last volume
key pressure
Always
y6
MR
Memory redial key has been pressed. Remains on until next key pressure
Always
y7
BO
Bell off. Indicates that ringer has been turn off.
Always
y8
SH
Shift; indicates that shift key has been pressed. Remains on untill next key
pressure
Optional
y9
-
Not used
Optional
y10
RD
Indicates that last number redial has been activated
Always
y11
PG
Indicates program mode
Symbol data are not effected by a BLINKING or by a WRITE&SHIFT command. Symbols will be displayed
independently from selecting the upper bank of the 32 digit buffer to be displayed.
The symbol displayed depends on the layout of the LCD display. If the layout of the 12/16 digit LCD displays can
be done similar, the symbol mapping does not need to be stored in the EEPROM.
Serial Interface
The serial interface uses the pins CS (chip select), SCLK (serial clock line), and DI (data input). A frame consists of
a 3-bit command and 5-bit data (see Figure 5: Frame of serial interface). Commands are executed self-timed by
the internal clock and commence at the falling edge of the CS signal.
CS
SCLK
DI
C3
MSB
C2
C1
D4
D3
D2
D1
D0
LSB
Figure 5: Frame of serial interface
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