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參數(shù)資料
| 型號： | P82C55A |
| 廠商： | INTEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | CHMOS PROGRAMMABLE PERIPHERAL INTERFACE |
| 中文描述： | 24 I/O, PIA-GENERAL PURPOSE, PDIP40 |
| 封裝： | DIP-40 |
| 文件頁數(shù)： | 17/23頁 |
| 文件大?。?/td> | 325K |
| 代理商： | P82C55A |
82C55A
Reading Port C Status
In Mode 0, Port C transfers data to or from the pe-
ripheral device. When the 82C55A is programmed to
function in Modes 1 or 2, Port C generates or ac-
cepts ‘‘hand-shaking’’ signals with the peripheral de-
vice. Reading the contents of Port C allows the pro-
grammer to test or verify the ‘‘status’’ of each pe-
ripheral device and change the program flow ac-
cordingly.
There is no special instruction to read the status in-
formation from Port C. A normal read operation of
Port C is executed to perform this function.
INPUT CONFIGURATION
D
5
D
4
D
7
D
6
D
3
D
2
D
1
D
0
I/O I/O IBF
A
INTE
A
INTR
A
INTE
B
IBF
B
INTR
B
GROUP A
GROUP B
OUTPUT CONFIGURATIONS
D
5
D
4
D
3
D
7
D
6
D
2
D
1
D
0
OBF
A
INTE
A
I/O I/O INTR
A
INTE
B
OBF
B
INTR
B
GROUP A
GROUP B
Figure 17a. MODE 1 Status Word Format
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
OBF
A
INTE
1
IBF
A
INTE
2
INTR
A
GROUP A
GROUP B
(Defined By Mode 0 or Mode 1 Selection)
Figure 17b. MODE 2 Status Word Format
Interrupt Enable Flag
Position
Alternate Port C Pin Signal (Mode)
INTE B
INTE A2
INTE A1
PC2
PC4
PC6
ACK
B
(Output Mode 1) or STB
B
(Input Mode 1)
STB
A
(Input Mode 1 or Mode 2)
ACK
A
(Output Mode 1 or Mode 2
Figure 18. Interrupt Enable Flags in Modes 1 and 2
17
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| P82C55A2 | 制造商:Intel 功能描述: |
| P82C55A-2 | 制造商:Rochester Electronics LLC 功能描述: |
| P82C574 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral Interface |
| P82C59A2 | 制造商:INTEL 功能描述:* 制造商:Intel 功能描述: |
| P82C59A-2 | 制造商:Intel 功能描述: |
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