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| 型號(hào)： | PEF82902H |
| 元件分類： | 視頻放大器 |
| 英文描述： | Low Cost Dual and Quad Video Amplifiers; Package: SO; No of Pins: 8; Temperature Range: 0°C to +70°C |
| 中文描述： | ？4B3T二將軍ModuIar整體服務(wù)數(shù)位網(wǎng)路新臺(tái)幣（智能）？ |
| 文件頁(yè)數(shù)： | 56/205頁(yè) |
| 文件大?。?/td> | 3205K |
| 代理商： | PEF82902H |
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PEF 82902
Functional Description
Data Sheet
44
2001-11-09
it enables other MONITOR channel interrupts by setting MONITOR Interrupt Enable
(MIE) to
’
1
’
.
As a result, the first MONITOR byte is acknowledged by the receiving device setting the
MR bit to
’
0
’
. This causes a MONITOR Data Acknowledge MDA interrupt status at the
transmitter.
A new MONITOR data byte can now be written by the microprocessor in MOX. The MX
bit is still in the active (0) state. The transmitter indicates a new byte in the MONITOR
channel by returning the MX bit active after sending it once in the inactive state. As a
result, the receiver stores the MONITOR byte in MOR and generates a new MDR
interrupt status. When the microprocessor has read the MOR register, the receiver
acknowledges the data by returning the MR bit active after sending it once in the inactive
state. This in turn causes the transmitter to generate a MDA interrupt status.
This "MDA interrupt
–
write data
–
MDR interrupt
–
read data
–
MDA interrupt"
handshake is repeated as long as the transmitter has data to send. Note that the
MONITOR channel protocol imposes no maximum reaction times to the microprocessor.
When the last byte has been acknowledged by the receiver (MDA interrupt status), the
microprocessor sets the MONITOR Transmit Control bit MXC to
’
0
’
. This enforces an
inactive (
’
1
’
) state in the MX bit. Two frames of MX inactive signifies the end of a
message. Thus, a MONITOR Channel End of Reception MER interrupt status is
generated by the receiver when the MX bit is received in the inactive state in two
consecutive frames. As a result, the microprocessor sets the MR control bit MRC to 0,
which in turn enforces an inactive state in the MR bit. This marks the end of the
transmission, making the MONITOR Channel Active MAC bit return to
’
0
’
.
During a transmission process, it is possible for the receiver to ask a transmission to be
aborted by sending an inactive MR bit value in two consecutive frames. This is effected
by the microprocessor writing the MR control bit MRC to
’
0
’
. An aborted transmission is
indicated by a MONITOR Channel Data Abort MAB interrupt status at the transmitter.
The MONITOR transfer protocol rules are summarized in the following section
A pair of MX and MR in the inactive state for two or more consecutive frames indicates
an
idle state
or an
end of transmission
.
A
start of a transmission
is initiated by the transmitter by setting the MXC bit to
’
1
’
enabling the internal MX control. The receiver acknowledges the received first byte by
setting the MR control bit to
’
1
’
enabling the internal MR control.
The internal MX, MR control indicates or acknowledges a new byte in the MON slot
by toggling MX, MR from the active to the inactive state for one frame.
Two frames with the MR-bit set to inactive indicate a receiver request for
abort
.
The transmitter can
delay a transmission
sequence by sending the same byte
continuously. In that case the MX-bit remains active in the IOM -2 frame following the
first byte occurrence. Delaying a transmission sequence is only possible while the
receiver MR-bit and the transmitter MX-bit are active.
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| PEF82912H | Low Cost Dual and Quad Video Amplifiers; Package: SO; No of Pins: 14; Temperature Range: 0°C to +70°C |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PEF82912F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:?2B1Q Second Generation Modular ISDN NT (Intelligent)? |
| PEF82912FV1.4 | 功能描述:ISDN 接口 ISDN RoHS:否 制造商:Texas Instruments 封裝:Tube |
| PEF82912FV14XP | 制造商:Lantiq 功能描述:ISDN S/T/U HDLC Interface 1-Line 192Kbps 3.3V 64-Pin MQFP |
| PEF82912FV14XT | 制造商:Lantiq 功能描述:Q-SMINTI |
| PEF82912H | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:?2B1Q Second Generation Modular ISDN NT (Intelligent)? |
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