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參數資料
| 型號： | AS2590 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 英文描述： | LC DISPLAY DRIVER WITH 18 DIGITS, 6 SYMBOLS AND CLOCK/TIMER |
| 中文描述： | 立法會顯示驅動器，帶有18個數字，符號和6時鐘/計時器 |
| 文件頁數： | 6/12頁 |
| 文件大小： | 78K |
| 代理商： | AS2590 |
6
Data Sheet
AS2590
Rev. 1
Dec. 1993
BP0
BP1
BP2
BP3
S0
S1
V
DD
V
2/3
V
1/3
Vss
V
DD
V
2/3
V
1/3
Vss
V
DD
V
2/3
V
1/3
Vss
V
DD
V
2/3
V
1/3
Vss
V
DD
V
2/3
V
1/3
Vss
V
DD
V
2/3
V
1/3
Vss
Active Backplane
BP1
BP2
BP0
BP3
on
off
off
off
off
on
on
on
to high transition of the data line while the clock line is
high followed by a negative clock pulse indicates a stop
condition (see figure 4).
SDA
SCL
START
#1
LSB
B0
B1
B2
Figure 4 Interface Timing
B3
MSB
B4
STOP
#1
WORD
GAP
START
#2
Serial Interface
The serial interface is a one way, two line link between
the dialler (AS2574) and the display driver. The two lines
are the serial data line (SDA) and the serial clock line
(SCL). The display driver can only receive data.
Word Transfer:
Data are transferred as 5 bit words with start and stop bit.
the least significant bit is sent first after the start bit. As
long as there is no data transfer, both data and clock
lines have to remain high. Also between two words both
lines have to stay high for a specified time. Figure 4
shows the timing of the serial interface.
Start and Stop Conditions:
A start condition is detected when the data line goes
from high to low while the clock line is held high. A low
Figure 3 LCD driver outputs
Table 4 Codes for Serial Interface
NO SYMBOL MSB
1
SB0-on
2
SB0-off
3
SB1-on
4
SB1-off
5
SB2-on
6
SB2-off
7
SET CLOCK
8
START
9
COPY
10
FIFO
11
TIMER
12
BLANK
13
TEST
14
0
15
1
16
2
17
3
18
4
19
5
20
6
21
7
22
8
23
9
24
a
25
b
26
c
27
d
28
*
29
#
30
–
31
P/T
32
r
B3
0
0
0
1
0
1
1
1
1
0
0
1
0
1
0
0
0
0
0
0
1
1
1
0
0
1
1
1
1
1
1
0
B2
1
0
0
0
1
1
0
1
1
0
1
1
1
1
0
1
0
0
1
0
0
1
0
1
1
1
1
0
0
0
0
0
B1
0
1
0
0
1
1
1
0
1
1
0
0
1
0
0
0
1
0
0
1
0
0
1
1
1
1
1
0
1
1
0
0
LSB HEX
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
1
0
0
1
0
0
0
1
1
1
1
1
0
0
0
1
1
1
0
0
0
0
1
0
1
1
1
1
1
0
05
03
11
09
07
1F
0B
0D
0F
13
15
1D
17
1C
00
04
02
10
14
12
08
0C
0A
06
16
0E
1E
18
1A
1B
19
01
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