參數(shù)資料
型號(hào)： PE-65967
廠商： Exar Corporation
英文描述： E3/DS3/STS-1 LINE INTERFACE UNIT
中文描述： E3/DS3/STS-1線路接口單元
文件頁數(shù)： 39/55頁
文件大?。?/td> 608K
代理商： PE-65967
á
XRT7300
E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.1.1
35
of the RPOS, RNEG and RCLK signals when the
RCLK signal has been inverted.
In order to configure the XRT7300 to invert the
RCLK1 output signal, the XRT7300 must be operat-
ing in the HOST Mode. This configuration can be im-
plemented by accessing the Microprocessor Serial
Interface block and writing a “1” into the RCLK1INV
bit-field in Command Register CR3 to invert RCLK1.
The RCLK2 output signal can also be inverted when
the XRT7300 is operating in the Hardware Mode by
setting the RCLK2INV input pin “High”.
3.7.1
Routing Single-Rail Format data (Binary
Data Stream) to the Receive Terminal Equipment
To route Single-Rail format data (e.g., a binary data
stream) from the Receive Section of the XRT7300 to
the Receiving Terminal Equipment, do the following:
A.
configure the XRT7300 to operate in the HOST
Mode and
B.
access the Microprocessor Serial Interface and
write a “1” into the RNRZ bit-field in Command
Register CR3.
After these steps are taken, the XRT7300 outputs
Single-Rail data to the Receiving Terminal Equipment
via the RPOS and RCLK1 (or RCLK2) output pins as
illustrated in Figure 26 and Figure 27.
N
OTE
:
The RNEG output pin is internally tied to Ground
whenever this feature is enabled.
F
IGURE
25. T
HE
B
EHAVIOR
OF
THE
RPOS, RNEG
AND
RCLK1 S
IGNALS
W
HEN
RCLK1
IS
I
NVERTED
RCLK1
RPOS
RNEG
COMMAND REGISTER CR3 (ADDRESS = 0X03)
D4
D3
D2
D1
D0
RNRZ
LOSMUT
CLK2DIS
RCLK2INV
RCLK1INV
X
X
X
1
1
COMMAND REGISTER CR3 (ADDRESS = 0X03)
D4
D3
D2
D1
D0
RNRZ
LOSMUT CLK2DIS
RCLK2INV
RCLK1INV
1
X
X
X
X
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