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XRT73L04BIV Datasheet(PDF) 10 Page - Exar Corporation |
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XRT73L04BIV Datasheet(HTML) 10 Page - Exar Corporation |
10 / 64 page XRT73L04B 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT REV. 1.0.1 6 RECEIVE INTERFACE PIN #NAME TYPE DESCRIPTION 59 53 121 127 RxClk_0 RxClk_1 RxClk_2 RxClk_3 OReceive Clock Output - Channel (n): This output pin is the Recovered Clock signal from the incoming line sig- nal for Channel (n). The Receive Section of Channel (n) outputs data via the RPOS_(n) and RNEG_(n) output pins on the rising edge of this clock signal. Configure the Receive Section of Channel (n) to update the data on the RPOS_(n) and RNEG_(n) output pins on the falling edge of RxClk_(n) 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 within the Command Register. 60 54 120 126 RNEG_0/LCV_0 RNEG_1/LCV_1 RNEG_2/LCV_2 RNEG_3/LCV_3 O Receive Negative Data Output - Channel (n): The function of this pin is dependent on whether the 73L04A is in the Hardware or HOST Mode (HOST/HW) and the condition of CS/(SR/DR). a. Operating in the Hardware Mode Receive Negative Data: Setting the CS/(SR/DR) pin ”Low”, (Dual-Rail operation) this output pin pulses "High" whenever Channel (n) has received a Negative Polarity pulse in the incoming line signal at the RTIP_(n) and RRing_(n) inputs. Line Code Violation: When CS/(SR/DR) is set “High”, (Single-Rail operation), the B3ZS/HDB3 Encoder/Decoder is activated and the Line Code Violation signal is out- put on this pin. b. Operating in the HOST Mode Receive Negative Data: Writing a “0” to the (SR/DR)_(n) bit in the command register configures channel(n) in the Dual-Rail Mode and activates RNEG_(n). Writing a “1” to (SR/DR)_(n) bit of the Command Register configures the Single-Rail Mode and activates LCV_(n). If the B3ZS/HDB3 Decoder is enabled then the zero suppression pat- terns in the incoming line signal (such as: "00V", "000V", "B0V", "B00V") is not reflected at this output. 61 55 119 125 RPOS_0 RPOS_1 RPOS_2 RPOS_3 O Receive Positive Data Output - Channel (n): The function of this pin is dependent on the setting of the CS/(SR/DR) pin. Receive Positive Data If CS/(SR/DR) is set “Low” (Dual-Rail Mode), this output pin pulses "High" whenever Channel (n) has received a Positive Polarity pulse in the incoming line signal at the RTIP_(n)/RRing_(n) inputs. Data Output If CS/(SR/DR) is set “High” (Single-Rail Mode), data is output on this pin. If the B3ZS/HDB3 Decoder is enabled then the zero suppression pat- terns in the incoming line signal (such as: "00V", "000V", "B0V", "B00V") is not reflected at this output. 79 87 102 94 RRing_0 RRing_1 RRing_2 RRing_3 I Receive Ring Input - Channel (n): This input pin along with RTIP_(n) is used to receive the bipolar line sig- nal from the Remote DS3/E3/STS-1 Terminal. |
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