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參數(shù)資料
| 型號： | PEB80900H |
| 英文描述： | ?Network Termination Controller? |
| 中文描述： | ？網(wǎng)絡終端控制器？ |
| 文件頁數(shù)： | 54/181頁 |
| 文件大小： | 3288K |
| 代理商： | PEB80900H |
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PEB 80900
Part I
’
NTC-T
’
: Functional Description
Data Sheet
42
2001-04-02
Acknowledge Sent/Received
After having sent the awake signal, the U-transceiver has received the acknowledge
signal. If being awoken the U-transceiver has sent the acknowledge. Anyway, the U-
transceiver waits for possible repetition or time-out. The user data (2B + D) on pin DD is
clamped to high to avoid undesired false data in the D-channel during activation.
Awake Signal Sent
The U-transceiver is awaking the U-interface and waits for the acknowledge or for the
time-out after sending the awake signal. The user data (2B + D) on pin DD is clamped
to high.
Deactivation Request Received
The U-transceiver has received INFO U0 or one of the deactivating maintenance
requests, RES or SSP. If it receives SSP, the U-transceiver sends a single pulse every
1 ms on the line, otherwise INFO U0 is sent. The U-transceiver remains at least 0.5 ms
in this state before accepting DI. The user data (2B + D) on pin DD is clamped to high.
Deactivating
The U-transceiver deactivates U sending INFO U0; it remains at least 0.5 ms in this
state. The user data (2B + D) on pin DD is clamped to high .
Data Transmission
The transmission of user data is enabled (INFO U5). If in 64 subsequent U-frames the
Barker-code is not found at the expected position, the U-transceiver issues RSY on the
C/I-channel until it has resynchronized, i.e. found the Barker-code on the same position
in 4 subsequent frames.
IOM Awaked
The U-transceiver is awoken by the S-transceiver keeping line DU low (TIM). When it
receives DI again in the C/I channel, the U-transceiver goes back to power-down within
at least 0.5 ms. The user data (2B + D) on pin DD is clamped to high.
Power Down
Entering this state, the U-transceiver powers down within 0.5 ms stopping most parts of
the U-transceiver, so that these CMOS circuits cannot consume further power. The U-
transceiver stops clocking the IOM-2 interface, if it has received four times DI in the C/I
channel. If the IOM-2 interface clock is stopped, it can be activated by the S-transceiver
by forcing DU to low.
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相關代理商/技術參數(shù) |
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| PEB8091HDV1.1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Infineon Technologies AG 功能描述: |
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