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XRT73R12 Datasheet(PDF) 10 Page - Exar Corporation |
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XRT73R12 Datasheet(HTML) 10 Page - Exar Corporation |
10 / 89 page XRT73R12 7 TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT REV. 1.0.2 F23 AC26 F24 U23 L23 T24 L4 T3 F3 U4 F4 AC1 RxNEG/LCV0 RxNEG/LCV1 RxNEG/LCV2 RxNEG/LCV3 RxNEG/LCV4 RxNEG/LCV5 RxNEG/LCV6 RxNEG/LCV7 RxNEG/LCV8 RxNEG/LCV9 RxNEG/LCV10 RxNEG/LCV11 O Receive Negative Data Output/Line Code Violation The function of these pins depends on whether the XRT73R12 is configured in Single Rail or Dual Rail mode. Dual-Rail Mode - Receive Negative Polarity Data Output In the Dual-Rail Mode, all negative-polarity data will be output via this pin. The positive-polarity data will be output via the corresponding RxPOS_n output pin. In other words, the Receive Section of the corresponding Channel will pulse this output pin "High" for one period of RxCLK_n anytime it receives a negative- polarity pulse via the RTIP/RRING input pins. The data output via this pin is updated upon the active edge of the RCLK_n output clock signal. Single-Rail Mode - Line Code Violation Indicator Output In the Single-Rail Mode, this output pin will function as the Line Code Violation indicator output. In this configuration, the Receive Section of the Channel will pulse this output pin "High" for at least one RCLK period whenever it detects either an LCV (Line Code Violation) or an EXZ (Excessive Zero Event). The data that is output via this pin is updated upon the active edge of the RCLK_n output clock signal. E24 AC25 J23 V23 K24 T23 K3 T4 J4 V4 E3 AC2 RxCLK0 RxCLK1 RxCLK2 RxCLK3 RxCLK4 RxCLK5 RxCLK6 RxCLK7 RxCLK8 RxCLK9 RxCLK10 RxCLK11 O Receive Clock Output This output pin functions as the Receive or recovered clock signal. All Receive (or recovered) data will output via the RxPOS_n and RxNEG_n outputs upon the active edge of this clock signal. Additionally, if the device/channel has been configured to operate in the Single- Rail Mode, then the RNEG_n/LCV_n output pins will also be updated upon the active edge of this clock signal. SYSTEM-SIDE RECEIVE OUTPUT AND RECEIVE CONTROL PINS PIN # SIGNAL NAME TYPE DESCRIPTION |
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