參數(shù)資料
型號: XRT5997
廠商: Exar Corporation
英文描述: Seven-Channel E1 Line Interface Unit(7通道 E1線接口單元)
中文描述: 七通道E1線路接口單元(7通道素E1線接口單元)
文件頁數(shù): 20/37頁
文件大小: 367K
代理商: XRT5997
XRT5997
20
Rev. 1.0.0
TClk_x
TxPOS_x
TxNEG_x
tSU
tHO
Figure 2. Illustration on how the XRT5997 Device Samples the data on
the TxPOS_x and TxNEG_x input pins
In general, if the XRT5997 device samples a “1” on the
TxPOS_x input pin, then the “Transmit Section” of the
device will ultimately generate a positive polarity pulse
via the TTIP_x and TRing_x output pins (across a 1:2
transformer). Conversely, if the XRT5997 device
samples a “1” on the “TxNEG_x” input pin, then the
“Transmit Section” of the device will ultimately gener-
ate a negative polarity pulse via the TTIP_x and TRing_x
output pins (across a 1:2 transformer).
1.2.1
Operating the Transmitter in the
“Clockless” Mode
The user can configure a given channel (within the
XRT5997 device) to operate in the “Clockless” mode by
doing the following:
Not applying a clock signal to the TxClk_x input,
and either pulling this pin to VDD or letting it float.
By applying RZ (Return to Zero) data to the
TxPOS_x and TxNEG_x input pins, as illustrated
below.
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