参数资料
| 型号： | IS82C55A-5 |
| 厂商： | Intersil |
| 文件页数： | 23/29页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER 24B 44PLCC |
| 标准包装： | 260 |
| 接口： | 可编程 |
| 输入/输出数： | 24 |
| 中断输出： | 无 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC |
| 包装： | 管件 |
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3
FN2969.10
November 16, 2006
Functional Diagram
Pin Description
SYMBOL
TYPE
DESCRIPTION
VCC
VCC: The +5V power supply pin. A 0.1μF capacitor between VCC and GND is recommended for decoupling.
GND
GROUND
D0-D7
I/O
DATA BUS: The Data Bus lines are bidirectional three-state pins connected to the system data bus.
RESET
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
I
CHIP SELECT: Chip select is an active low input used to enable the 82C55A onto the Data Bus for CPU
communications.
RD
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
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
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
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
I/O
PORT B: 8-bit input and output port. Bus hold high circuitry is present on this port.
PC0-PC7
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
BIDIRECTIONAL
DATA BUS
I/O
PA7-PA0
I/O
PC7-PC4
I/O
PC3-PC0
I/O
PB7-PB0
8-BIT
INTERNAL
DATA BUS
82C55A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IS82C55A-596 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| IS82C55A-5Z | 功能描述:外围驱动器与原件 - PCI W/ANNEAL PERIPH PRG- I/O 5V 5MHZ 44PLCC RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| IS82C55A-5Z96 | 功能描述:外围驱动器与原件 - PCI W/ANNEAL PERIPH PRG- I/O 5V 5MHZ 44PLCC RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| IS82C55A96 | 功能描述:外围驱动器与原件 - PCI PERIPH PRG-I/O 5V 8MHZ 44PLCC INDEL RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| IS82C55AR2490 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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