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參數(shù)資料
| 型號(hào)： | XRT79L72 |
| 廠商： | Exar Corporation |
| 英文描述： | 2 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| 中文描述： | 2 -通道DS3/E3自動(dòng)柜員機(jī)用戶到網(wǎng)絡(luò)接口/ Combo IC對(duì)購買力平價(jià) |
| 文件頁數(shù)： | 34/72頁 |
| 文件大?。?/td> | 441K |
| 代理商： | XRT79L72 |
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XRT79L72
REV. P1.0.2
PRELIMINARY
2 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
xr
31
N2
J25
RxPFrame
_0
/
RxOHInd
_0
RxPFrame
_1
/
RxOHInd
_1
O
O
Receive PLCP Frame Indicator/Receive Overhead Indicator Output:
The function of these output pins depend upon whether the XRT79L72 has
been configured to operate in the ATM/PLCP, the Clear-Channel Framer/Serial
or the Clear-Channel Framer/Nibble-Parallel Modes.
ATM/PLCP Mode - RxPFrame:
These output pins pulse "High" when the Receive PLCP Processor is receiving
the last bit of a PLCP frame.
N
OTE
:
These output pins are inactive if the XRT79L72 is configured to operate
in the Direct-Mapped ATM Mode.
Clear-Channel Framer/Serial Mode - RxOHInd:
These output pins pulse "High" for one bit-period whenever an overhead bit is
being output via the RxSer output pin, by the Receive Payload Data Output
Interface block.
N
OTE
:
If the user configures the XRT79L72 to operate in the Gapped-Clock
Mode, then these output pins will provide a demand clock to the local terminal
equipment. In the Gapped-Clock Mode, these output pins will only provide a
clock pulse, whenever a payload bit is being output via the RxSer output pin.
These output pins will NOT generate a clock pulse, whenever an overhead is
being output via the RxSer output pin.
Clear-Channel Framer/Nibble-Parallel - RxOHInd:
These output pins pulse "High" for one nibble-period whenever an overhead
nibble is being output via the RxNibn[3:0] output pins by the Receive Payload
Data Output Interface block.
N
OTE
:
1.If the XRT79L72 device has been configured to operate in both the
DS3 and the Nibble-Parallel" Modes, then the RxOHInd output pin will be in-
active and will pulled "LOW" at all times.
N
OTE
:
2.If the XRT79L72 device has been configured to operate in both the E3
and the Nibble-Parallel" Mode, then the RxOHInd output pin will be active and
will pulse "high" to denote overhead nibbles.
N
OTE
:
3.The purpose of this output pin is to alert the System-Side terminal
equipment that an
P
IN
#
N
AME
TYPE
D
ESCRIPTION
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XRT79L72IB | 2 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| XRT79L73 | 3 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| XRT79L73IB | 3 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| XRT79L74 | 4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| XRT79L74IB | 4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT79L72IB | 制造商:EXAR 制造商全稱:EXAR 功能描述:2 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| XRT79L73 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| XRT79L73IB | 制造商:EXAR 制造商全稱:EXAR 功能描述:3 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| XRT79L74 | 制造商:EXAR 制造商全稱:EXAR 功能描述:4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| XRT79L74IB | 制造商:EXAR 制造商全稱:EXAR 功能描述:4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
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