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XRT83VSH38 Datasheet(PDF) 8 Page - Exar Corporation |
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XRT83VSH38 Datasheet(HTML) 8 Page - Exar Corporation |
8 / 76 page XRT83VSH38 5 8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT REV. 1.0.7 PIN DESCRIPTION BY FUNCTION RECEIVE SECTION SIGNAL NAME BGA LEAD # TYPE DESCRIPTION RXON K16 I Receiver On Hardware Mode Only This pin is used to enable the receivers for all channels. By default, the receivers are turned ON in hardware mode. To turn the receivers OFF, pull this pin "Low". NOTE: Internally pulled "High" with a 50k Ω resistor. RLOS0 RLOS1 RLOS2 RLOS3 RLOS4 RLOS5 RLOS6 RLOS7 C3 H4 H15 A16 V3 L2 J15 T15 O Receive Loss of Signal When a receive loss of signal occurs according to ITU-T G.775, the RLOS pin will go "High" for a minimum of one RCLK cycle. RLOS will remain "High" until the loss of signal condition clears. See the Receive Loss of Signal section of this datasheet for more details. NOTE: This pin can be used for redundancy applications to initiate an automatic switch to a backup card. RCLK0 RCLK1 RCLK2 RCLK3 RCLK4 RCLK5 RCLK6 RCLK7 B3 H3 H16 A17 U3 L3 M15 U16 O Receive Clock Output RCLK is the recovered clock from the incoming data stream. If the incoming signal is absent or RTIP/RRING are in "High-Z", RCLK maintains its timing by using an internal master clock as its reference. RPOS/RNEG data can be updated on either edge of RCLK selected by RCLKE. NOTE: RCLKE is a global setting that applies to all 8 channels. RNEG/LCV0 RNEG/LCV1 RNEG/LCV2 RNEG/LCV3 RNEG/LCV4 RNEG/LCV5 RNEG/LCV6 RNEG/LCV7 A2 H2 H18 B16 T4 M4 M16 V17 O RNEG/LCV_OF Output In dual rail mode, this pin is the receive negative data output. In single rail mode, this pin is a Line Code Violation / Overflow indicator Indicator. If LCV is selected by software and if a line code violation, a bi-polar violation, or excessive zeros occur, the LCV_OF pin will pull "High" for a minimum of one RCLK cycle. LCV_OF will remain "High" until there are no more violations. However, if OF (Overflow) is selected, then the LCV_OF pin will pull "High" if the internal LCV counter is satu- rated. The LCV_OF pin will remain "High" until the LCV counter is reset. RPOS0 RPOS1 RPOS2 RPOS3 RPOS4 RPOS5 RPOS6 RPOS7 B2 G2 D15 B17 U2 M3 L17 T17 O RPOS/RDATA Output Receive digital output pin. In dual rail mode, this pin is the receive positive data out- put. In single rail mode, this pin is the receive non-return to zero (NRZ) data output. |
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