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参数资料
| 型号： | MSM82C55A_2 |
| 厂商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | Programmable Universal I/O Interface Device(可编程通用I/O接口器件) |
| 中文描述： | 可编程通用I / O接口设备（可编程通用的I / O接口器件） |
| 文件页数： | 12/26页 |
| 文件大小： | 168K |
| 代理商： | MSM82C55A_2 |
12/26
Semiconductor
MSM82C55A-2RS/GS/VJS
Precaution for Mode Selection
The output registers for ports A and C are cleared to
f
each time data is written in the command
register and the mode is changed, but the port B state is undefined.
Bit Set/Reset Function
When port C is defined as output port, it is possible to set (set output to 1) or reset (set output
to 0) any one of 8 bits without affecting other bits as shown below.
D
0
Definition of set/reset
for a desired bit.
0 = Reset
1 = Set
D
1
D
2
D
3
D
4
D
5
D
6
D
7
Control word Identification flag
Be sure to set to 0 for bit set/reset
When set to 1, it becomes the control
word to define a mode and input/output.
Definition of bit wanted
to be set or reset.
Dont's Care
D
3
0
0
0
0
1
1
1
1
D
2
0
0
1
1
0
0
1
1
Port C
PC
0
PC
1
PC
2
PC
3
PC
4
PC
5
PC
6
PC
7
D
1
0
1
0
1
0
1
0
1
Interrupt Control Function
When the MSM82C55A-2 is used in mode 1 or mode 2, the interrupt signal for the CPU is
provided. The interrupt request signal is output from port C. When the internal flip-flop INTE
is set beforehand at this time, the desired interrupt request signal is output. When it is reset
beforehand, however, the interrupt request signal is not output. The set/reset of the internal
flip-flop is made by the bit set/reset operation for port C virtually.
Bit set
INTE is set
Interrupt allowed
Bit reset
INTE is reset
Interrupt inhibited
Operational Description by Mode
1. Mode 0 (Basic input/output operation)
Mode 0 makes the MSM82C55A-2 operate as a basic input port or output port. No control
signals such as interrupt request, etc. are required in this mode. All 24 bits can be used as
two-8-bit ports and two 4-bit ports. Sixteen combinations are then possible for inputs/
outputs. The inputs are not latched, but the outputs are.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MSM82C55A-2G3-2K | 制造商:OKI Semiconductor 功能描述:MSM82C55A-2G3-2K CPU I/O EOL211209 |
| MSM82C55A-2GS | 制造商:OKI 制造商全称:OKI electronic componets 功能描述:CMOS PROGRAMMABLE PERIPHERAL INTERFACE |
| MSM82C55A-2GS-2K | 制造商:ROHM Semiconductor 功能描述: 制造商:ROHM Semiconductor 功能描述:CMOS PROGRAMMABLE PERIPHERAL INTERFACE |
| MSM82C55A-2R3 | 制造商:OKI Semiconductor 功能描述:CPU I/O EOL211209 制造商:ROHM Semiconductor 功能描述: |
| MSM82C55A-2RS | 制造商:ROHM Semiconductor 功能描述: 制造商:OKI Semiconductor 功能描述:PERIPHERAL INTERFACE, 40 Pin, Plastic, DIP 制造商:ROHM Semiconductor 功能描述:CMOS PROGRAMMABLE PERIPHERAL INTERFACE |
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