參數(shù)資料
型號： 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)： 10/62頁
文件大?。?/td> 715K
代理商： XRT7302
XRT7302
2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
á
REV. 1.1.6
6
19
SDI/(RxOFF0)
I
Serial Data Input for the Microprocessor Serial Interface/Channel 0 -
Receiver Shut OFF Input pin:
The function of this input pin depends on whether the XRT7302 is operating in
the HOST Mode or in the Hardware Mode.
HOST Mode - Serial Data Input for the Microprocessor Serial Interface:
To read or write data into the Command Registers over the Microprocessor
Serial Interface, apply the Read/Write bit, the Address Values of the Com-
mand Registers and Data Value to be written during Write Operations to this
pin.
This input is sampled on the rising edge of the SClk pin.
Hardware Mode - Channel 0 Receiver Shut OFF Input pin:
Setting this input pin “High” shuts off the Channel 0 receiver. Setting this input
pin “Low” enables the Receive Section for full operation.
20
SDO/(E3_Ch0)
I/O
Serial Data Output from the Microprocessor Serial Interface/E3_Mode
Select - Channel 0:
The function of this pin depends on whether the XRT7302 is operating in the
HOST Mode or in the Hardware Mode.
HOST Mode Operation - Serial Data Output for the Microprocessor Serial
Interface:
This pin serially outputs the contents of the specified Command Register dur-
ing Read Operations. The data is updated on the falling edge of the SClk
input signal and tri-stated upon completion of data transfer.
Hardware Mode Operation - E3 Mode Select - Channel 0:
This input pin is used to configure Channel 0 in the XRT7302 to operate in the
E3 or STS/DS3 Modes. Setting this input pin to "High" configures Channel 0
to operate in the E3 Mode. Setting this input pin to "Low" configures Channel
0 to operate in either the DS3 or STS-1 Modes, depending upon the state of
the STS-1/DS3_Ch0 input pin.
21
STS-1/DS3_Ch0
I
STS-1/DS3 Select Input - Channel 0:
Set this input pint to “High” for STS-1 and “Low” for DS3 Operation.
The XRT7302 ignores this pin if the E3_Ch0 pin is set to “1". This input pin is
ignored if the XRT7302 is operating in the HOST Mode. If the XRT7302 is
operating in the HOST Mode, the pin should be tied to GND.
22
ICT
I
In-Circuit Test Input:
Setting this pin "Low" causes all digital and analog outputs to go into a high-
impedance state to allow for in-circuit testing. For normal operation, set this
pin "High".
N
OTE
:
This pin is internally pulled “High".
23
LOSTHR0
I
Loss of Signal Threshold Control - Channel 0:
The voltage forced on this pin controls the input loss of signal threshold for
Channel 0. Forcing the LOSTHR0 pin to GND or VDD provides two settings.
This pin must be set to the desired level upon power up and should not be
changed during operation.
N
OTE
:
This pin is only applicable during DS3 or STS-1 operations.
PIN DESCRIPTION
P
IN
#
S
IGNAL
N
AME
T
YPE
D
ESCRIPTION
相關(guān)PDF資料
PDF描述
XRT73L02M TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73L02MIV TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73L02 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線接口單元)
XRT73L03A 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L03AIV 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
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XRT73L00A 制造商:EXAR 制造商全稱:EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT
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XRT73L00AIV 制造商:EXAR 制造商全稱:EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT
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