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參數(shù)資料
| 型號： | COP472-3 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | COP472-3 Liquid Crystal Display Controller |
| 中文描述： | COP472 - 3液晶顯示控制器 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 143K |
| 代理商： | COP472-3 |
Functional Description
The COP472-3 drives 36 bits of display information orga-
nized as twelve segments and three backplanes. The
COP472-3 requires 40 information bits: 36 data and 4 con-
trol. The function of each control bit is described below.
Display information format is a function of the LCD intercon-
nections. A typical segment/backplane configuration is illus-
trated in Figure 5, with this configuration the COP472-3 will
drive 4 digits of 9 segments.
To adapt the COP472-3 to any LCD display configuration,
the segment/backplane multiplex scheme is illustrated in
Table I.
Two or more COP472-3 chips can be cascaded to drive
additional segments. There is no limit to the number of
COP472-3’s that can be used as long as the output loading
capacitance does not exceed specification.
TABLE I. COP472-3 Segment/Backplane
Multiplex Scheme
Bit Number
Segment,
Backplane
Data to
Numeric Display
1
2
3
4
5
6
7
8
SA1, BPC
SB1, BPB
SC1, BPA
SC1, BPB
SB1, BPC
SA1, BPB
SA1, BPA
SB1, BPA
SH
SG
SF
SE
SD
SC
SB
SA
Digit 1
9
SA2, BPC
SB2, BPB
SC2, BPA
SC2, BPB
SB2, BPC
SA2, BPB
SA2, BPA
SB2, BPA
SH
SG
SF
SE
SD
SC
SB
SA
10
11
12
13
14
15
16
Digit 2
17
18
19
20
21
22
23
24
SA3, BPC
SB3, BPB
SC3, BPA
SC3, BPB
SB3, BPC
SA3, BPB
SA3, BPA
SB3, BPA
SH
SG
SF
SE
SD
SC
SB
SA
Digit 3
25
26
27
28
29
30
31
32
SA4, BPC
SB4, BPB
SC4, BPA
SC4, BPB
SB4, BPC
SA4, BPB
SA4, BPA
SB4, BPA
SH
SG
SF
SE
SD
SC
SB
SA
Digit 4
33
34
35
36
37
38
39
40
SC1, BPC
SC2, BPC
SC3, BPC
SC4, BPC
not used
Q6
Q7
SYNC
SPA
SP2
SP3
SP4
Digit 1
Digit 2
Digit 3
Digit 4
SEGMENT DATA BITS
Data is loaded in serially, in sets of eight bits. Each set of
segment data is in the following format:
SA
SB
SC
SD
SE
SF
SG
SH
Data is shifted into an eight bit shift register. The first bit of
the data is for segment H, digit 1. The eighth bit is segment
A, digit 1. A set of eight bits is shifted in and then loaded into
the digit one latches. The second set of 8 bits is loaded into
digit two latches. The third set into digit three latches, and
the fourth set is loaded into digit four latches.
CONTROL BITS
The fifth set of 8 data bits contains special segment data
and control data in the following format:
SYNC
Q7
Q6
X
SP4
SP3
SP2
SP1
The first four bits shifted in contain the special character
segment data. The fifth bit is not used. The sixth and sev-
enth bits program the COP472-3 as a stand alone LCD driv-
er or as a master or slave for cascading COP472-3’s. BPC
of the master is connected to BPA of each slave. The fol-
lowing table summarizes the function of bits six and seven:
Q7
Q6
Function
BPC Output
BPA Output
1
1
Slave
Backplane
Output
Backplane
Output
Internal
Osc. Output
Internal
Osc. Output
Oscillator
Input
Backplane
Output
Oscillator
Input
Backplane
Output
0
1
Stand Alone
1
0
Not Used
0
0
Master
The eighth bit is used to synchronize two COP472-3’s to
drive an 8
(/2
-digit display.
http://www.national.com
5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| COP472MW-3 | COP472-3 Liquid Crystal Display Controller |
| COP472N-3 | COP472-3 Liquid Crystal Display Controller |
| COP680C | Microcontrollers |
| COP681C | Microcontrollers |
| COP682C | Microcontrollers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| COP472MW-3 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:COP472-3 Liquid Crystal Display Controller |
| COP472N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Controller |
| COP472N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Controller |
| COP472N-3 | 功能描述:顯示驅(qū)動器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| COP472N-3/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Controller |
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