- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67721 > IPD2548A 5X7 DOT MATRIX DISPLAY, YELLOW, 6.4 mm PDF資料下載
參數(shù)資料
| 型號(hào)： | IPD2548A |
| 元件分類： | 顯示用LED |
| 英文描述： | 5X7 DOT MATRIX DISPLAY, YELLOW, 6.4 mm |
| 封裝： | ROHS COMPLIANT, HERMETIC SEALED, CERAMIC PACKAGE-20 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 869K |
| 代理商： | IPD2548A |
IPD2545A, IPD2547A, IPD2548A
2006-03-03
7
Block Diagram
Functional Description
The block diagram includes 5 major blocks and internal registers
(indicated by dotted lines).
Display Memory consists of a 5 x 8 bit RAM block. Each of the
four 8-bit words holds the 7-bits of ASCII data (bits D0–D6) and an
attribute select bit (Bit D7). The fifth 8-bit memory word is used as
a control word register. A detailed description of the control regis-
ter and its functions can be found under the heading Control Word.
Each 8-bit word is addressable and can be read from or written to.
The Control Logic dictates all of the features of the display device
and is discussed in the Control Word section of this
data sheet.
The Character Generator converts the 7-bit ASCII data into the
proper dot pattern for the 128 characters shown in the character
set chart.
The Clock Source can originate either from the internal oscillator
clock or from an external source–usually from the output of
another IPD2545/7/8A in a multiple module display.
The Display Multiplexer controls all display output to the digit
drivers so no additional logic is required for a display system.
The Column Drivers are connected directly to the display.
The Display has four digits. Each of the four digits is comprised of
35 LEDs in a 5 x 7 dot array which makes up the alphanumeric
characters.
The intensity of the display can be varied by the Control Word in
steps of 0% (Blank), 25%, 50%, and full brightness.
The Reset pin when activated clears the internal counter. A reset
is usually done after power up and is of very short duration-nano-
seconds or microseconds. If the reset pin is held low for a longer
time (milliseconds) some or all LEDs in the bottom row may light
up. The appearance of lit LEDs during a “reset” is not an indication
of a malfunctioning part. It is advisable to keep the reset pulse as
short as possible to avoid displaying a row of lit LEDs.
Microprocessor Interface
The interface to the microprocessor is through the address lines.
(A0–A2), the data bus (D0–D7), two chip select lines (CE0, CE1),
and read (RD) and write (WR) lines.
The CE0 should be held low when executing a read, or write oper-
ation. CE1 must be held high.
The read and write lines are both active low. During a valid read
the data lines (D0–D7) become outputs. A valid write will enable
the data lines as inputs.
Input Buffering
If a cable length of 6 inches or more is used, all inputs to the dis-
play should be buffered with a tri-state non-inverting buffer
mounted as close to the display as conveniently possible. Recom-
mended buffers are: 74LS245 for the data lines and 74LS244 for
the control lines.
Mode Selection
CEO
CE1
RD
WR
Operation
0
1
0
None
1
X
None
X
0
X
None
X
1
None
0=Low logic level, 1=High logic level, X=Don’t care
IDBD5065
(RAM) 4 x 8
Display Memory
Reg
Control
1 x 8
ROM
128 x 5
128 Char
14
and
Mux
Decode
4
Logic
Control
Output
8
OSC
Logic
Multiplexer
Display
Drivers
Column
Latch
Output
3
Row
Drivers
5
1
3
15
20
Display
3
CLK SEL
XCLK
RST
RD, WR
A0-A2
CE0, CE1
7
8
D0-D7
Data Input Commands
CEO
CE1
RD
WR
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
Operation
1
0
X
No Change
0
1
0
1
0
X
Read Digit 0 Data to Bus
0
1
0
1
0
1
0
1
0
($) Written to Digit 0
0
1
0
1
0
1
0
1
0
1
0
1
(W) Written to Digit 1
0
1
0
1
0
1
0
1
0
(f) Written to Digit 2
0
1
0
1
0
1
0
1
(3) Written to Digit 3
0
1
0
1
0
1
X
Char. Written to Digit 0
and Cursor Enabled
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IQ32B-TQ52 | CROSSBAR SWITCH, PQFP52 |
| IQ64B-12PQ100I | SPECIALTY MICROPROCESSOR CIRCUIT, PQFP100 |
| IQ64B-15J84 | SPECIALTY MICROPROCESSOR CIRCUIT, PQCC84 |
| IQ128-12PQ184 | SPECIALTY MICROPROCESSOR CIRCUIT, PQFP184 |
| IQ160-12PQ208I | SPECIALTY MICROPROCESSOR CIRCUIT, PQFP208 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IPD2557-20 | 制造商:OSRAM 功能描述: |
| IPD25CN10N G | 功能描述:MOSFET OptiMOS 2 PWR TRANST 100V 35A RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube |
| IPD25CN10N G | 制造商:Infineon Technologies AG 功能描述:MOSFET N CH 35A 100V PG-TO252-3 |
| IPD25CN10NG | 制造商:Infineon Technologies AG 功能描述: 制造商:Infineon Technologies AG 功能描述:100V,35A,N Channel Power MOSFET 制造商:Infineon Technologies AG 功能描述:100V,35A,N-channel power MOSFET |
| IPD25CN10NGBUMA1 | 制造商:Infineon Technologies AG 功能描述:Trans MOSFET N-CH 100V 35A 3-Pin(2+Tab) TO-252 制造商:Infineon Technologies AG 功能描述:N-KANAL POWER MOS - Tape and Reel 制造商:Infineon Technologies AG 功能描述:MOSFET N-CH 100V 35A TO252-3 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。