- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383639 > MR82C55B (Harris Corporation) CMOS Programmable Peripheral Interface PDF資料下載
參數(shù)資料
| 型號： | MR82C55B |
| 廠商： | Harris Corporation |
| 英文描述： | CMOS Programmable Peripheral Interface |
| 中文描述： | CMOS可編程外設(shè)接口 |
| 文件頁數(shù)： | 2/26頁 |
| 文件大?。?/td> | 234K |
| 代理商： | MR82C55B |
第1頁當(dāng)前第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁
2
Functional Diagram
Pin Description
SYMBOL
PIN
NUMBER
TYPE
DESCRIPTION
V
CC
26
V
CC
: The +5V power supply pin. A 0.1
μ
F capacitor between pins 26 and 7 is
recommended for decoupling.
GND
7
GROUND
D0-D7
27-34
I/O
DATA BUS: The Data Bus lines are bidirectional three-state pins connected to the
system data bus.
RESET
35
I
RESET: A high on this input clears the control register and all ports (A, B, C) are set
to the input mode with the “Bus Hold” circuitry turned on.
CS
6
I
CHIP SELECT: Chip select is an active low input used to enable the 82C55A onto the
Data Bus for CPU communications.
RD
5
I
READ: Read is an active low input control signal used by the CPU to read status
information or data via the data bus.
WR
36
I
WRITE: Write is an active low input control signal used by the CPU to load control
words and data into the 82C55A.
A0-A1
8, 9
I
ADDRESS: These input signals, in conjunction with the RD and WR inputs, control
the selection of one of the three ports or the control word register. A0 and A1 are
normally connected to the least significant bits of the Address Bus A0, A1.
PA0-PA7
1-4, 37-40
I/O
PORT A: 8-bit input and output port. Both bus hold high and bus hold low circuitry are
present on this port.
PB0-PB7
18-25
I/O
PORT B: 8-bit input and output port. Bus hold high circuitry is present on this port.
PC0-PC7
10-17
I/O
PORT C: 8-bit input and output port. Bus hold circuitry is present on this port.
GROUP A
PORT A
(8)
GROUP A
PORT C
UPPER
(4)
GROUP B
PORT C
LOWER
(4)
GROUP B
PORT B
(8)
GROUP B
CONTROL
GROUP A
CONTROL
DATA BUS
BUFFER
READ
WRITE
CONTROL
LOGIC
RD
WR
A1
A0
RESET
CS
D7-D0
POWER
SUPPLIES
+5V
GND
BI-DIRECTIONAL
DATA BUS
I/O
PA7-PA0
I/O
PC7-PC4
I/O
PC3-PC0
I/O
PB7-PB0
8-BIT
INTERNAL
DATA BUS
82C55A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MRCN810XXXFXXXME3 | Resistor/Capacitor Networks, Molded SIP |
| MRCN810XXXGXXXKE3 | Resistor/Capacitor Networks, Molded SIP |
| MRCN810XXXGXXXME3 | Resistor/Capacitor Networks, Molded SIP |
| MRCN810XXXJXXXKE3 | Resistor/Capacitor Networks, Molded SIP |
| MRCN810XXXJXXXME3 | Resistor/Capacitor Networks, Molded SIP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MR82C59A | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Priority Interrupt Controller |
| MR82C59A-12 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Priority Interrupt Controller |
| MR82C59A-12/B | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Harris Corporation 功能描述: |
| MR82C59A-12B | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Priority Interrupt Controller |
| MR82C59A-5 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Priority Interrupt Controller |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。