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参数资料
| 型号： | MSM82C55A-2 |
| 厂商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | CMOS Programmable Peripheral Interface(CMOS 可编程外围接口) |
| 中文描述： | CMOS可编程外围接口（的CMOS可编程外围接口） |
| 文件页数： | 14/26页 |
| 文件大小： | 189K |
| 代理商： | MSM82C55A-2 |
14/26
Semiconductor
MSM82C55A-2RS/GS/VJS
OBF
(Output buffer full flag output)
This signal when turned to low level indicates that data is written to the specified port upon
receipt of the
WR
signal from the CPU. This signal turns to low level at the rising edge of
the
WR
and high level at the falling edge of the ACK.
ACK
(Acknowledge input)
This signal when turned to low level indicates that the terminal has received data.
INTR (Interrupt request output)
This is the signal used to interrupt the CPU when a terminal receives data from the CPU via
the MSM82C55A-5. It indicates the occurrence of the interrupt in high level only when the
internal INTE flip-flop is set. This signal turns to high level at the rising edge of the
ACK
(OBF = 1 at this time) and low level at the falling edge of
WR
when the INTE
B
is set.
INTE
A
of group A is set when the bit for PC
6
is set, while INTE
B
of group B is set when the
bit for PC
2
is set.
Mode 1 Input
(Group A)
PA
7
-
PA
0
8
INTE
A
PC
4
PC
5
STB
A
IBF
A
PC
3
INTR
A
RD
(Group B)
PB
7
-
PB
0
INTE
B
PC
2
PC
1
STB
B
IBF
B
PC
0
INTR
B
RD
8
Note:
Although belonging to group B, PC
3
operates as the control signal of
group A functionally.
Mode 1 Output
(Group A)
PA
7
-
PA
0
8
INTE
A
PC
7
PC
6
OBF
A
ACK
A
PC
3
INTR
A
WR
(Group B)
PB
7
-
PB
0
8
INTE
B
PC
1
PC
2
OBF
B
ACK
B
PC
0
INTR
B
WR
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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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