參數(shù)資料
型號(hào)： XRT7302
廠商： Exar Corporation
英文描述： 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線接口單元)
中文描述： 2頻道E3/DS3/STS-1線路接口單元（2通道E3/DS3/STS-1線接口單元）
文件頁數(shù)： 14/62頁
文件大小： 715K
代理商： XRT7302
XRT7302
2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
á
REV. 1.1.6
10
50
RPOS1
O
Receive Positive Data Output - Channel 1:
This output pin pulses “High" whenever Channel 1 of the XRT7302 has
received a Positive Polarity pulse in the incoming line signal at the RTIP1/
RRing1 inputs.
N
OTE
:
If the Channel 1 B3ZS/HDB3 Decoder is enabled, then the zero sup-
pression patterns in the incoming line signal (such as: "00V", "000V", "B0V",
"B00V") is not reflected at this output.
51
RNEG1
O
Receive Negative Data Output - Channel 1:
This output pin pulses "High" whenever Channel 1 of the XRT7302 has
received a Negative Polarity pulse in the incoming line signal at the RTIP1/
RRing1 inputs.
N
OTE
:
If the Channel 1 B3ZS/HDB3 Decoder is enabled, then the zero sup-
pression patterns in the incoming line signal (such as: "00V", "000V", "B0V",
"B00V") is not reflected at this output.
52
RxClk1
O
Receive Clock Output pin - Channel 1:
This output pin is the Recovered Clock signal from the incoming line signal for
Channel 1. The receive section of Channel 1 outputs data via the RPOS1 and
RNEG1 output pins on the rising edge of this clock signal.
N
OTE
:
The Receive Section of Channel 1 is configured to update the data on
the RPOS1 and RNEG1 output pins on the falling edge of RxClk1 by doing
one of the following:
a.
Operating in the Hardware Mode
Pull the RxClkINV pin to "High".
b.
Operating in the HOST Mode
Write a "1" into the RxClkINV bit-field of the Command Register.
53
LOSMUTEN
I
MUTE-upon-LOS Enable Input (Hardware Mode):
This input pin is used to configure the XRT7302 while it is operating in the
Hardware Mode to MUTE the recovered data via the RPOS(n), RNEG(n) out-
put pins whenever one of the Channels declares an LOS condition.
Setting this input pin "High" configures all Channels to automatically pull the
RPOS(n) and RNEG(n) output pins to GND whenever it is declaring an LOS
condition, MUTing the data being output to the Terminal Equipment.
Setting this input pin "Low" configures all Channels to NOT automatically
MUTE the recovered data whenever an LOS condition is declared.
N
OTES
:
1. This input pin is ignored and should be connected to GND if the
XRT7302 is operating in the HOST Mode.
2. This pin is internally pulled "High".
54
DVDD
****
Receive Digital VDD - Channel 1
55
AGND
****
Analog Ground (Substrate Connection) - Channel 1
56
DGND
****
Transmit Digital GND - Channel 1
57
DMO1
O
Drive Monitor Output - Channel 1:
If no transmitted AMI signal is present on MTIP1 and MRing1 input pins for
128±32 TxClk periods, then DMO1 toggles and remains "High" until the next
AMI signal is detected.
PIN DESCRIPTION
P
IN
#
S
IGNAL
N
AME
T
YPE
D
ESCRIPTION
相關(guān)PDF資料
PDF描述
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