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XRT73L03AIV Datasheet(PDF) 8 Page - Exar Corporation |
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XRT73L03AIV Datasheet(HTML) 8 Page - Exar Corporation |
8 / 62 page XRT73L03A 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT REV. 2.0.4 6 RECEIVE INTERFACE PIN #NAME TYPE DESCRIPTION 49 111 43 RxClk_0 RxClk_1 RxClk_2 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. 50 110 44 RNEG_0 RNEG_1 RNEG_2 O Receive Negative Data Output - Channel (n): This output pin pulses "High" whenever Channel (n) of the XRT73L03A has received a Negative Polarity pulse in the incoming line signal at the RTIP_(n)/RRing_(n) inputs. NOTE: If the Channel (n) B3ZS/HDB3 Decoder is enabled, then the zero suppression patterns in the incoming line signal (such as: "00V", "000V", "B0V", "B00V") is not reflected at this output. 51 109 45 RPOS_0 RPOS_1 RPOS_2 O Receive Positive Data Output - Channel (n): This output pin pulses “High" whenever Channel (n) of the XRT73L03A has received a Positive Polarity pulse in the incoming line signal at the RTIP_(n)/RRing_(n) inputs. NOTE: If the Channel (n) B3ZS/HDB3 Decoder is enabled, then the zero suppression patterns in the incoming line signal (such as: "00V", "000V", "B0V", "B00V") is not reflected at this output. 71 85 79 RRing_0 RRing_1 RRing_2 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. 72 84 80 RTIP_0 RTIP_1 RTIP_2 I Receive TIP Input - Channel (n): This input pin along with RRing_(n) is used to receive the bipolar line sig- nal from the Remote DS3/E3/STS-1 Terminal. 74 82 100 REQEN_0 REQEN_1 REQEN_2 I Receive Equalization Enable Input - Channel (n): Setting this input pin "High" enables the Internal Receive Equalizer within Channel (n). Setting this pin "Low" disables the Internal Receive Equalizer. The guidelines for enabling and disabling the Receive Equal- izer are described in Section 3.2. NOTE: This pin is ignored and should be tied to GND if the XRT73L03A is going to be operating in the HOST Mode, (internally pulled-down). |
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