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XRT86VL32IB Datasheet(PDF) 10 Page - Exar Corporation |
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XRT86VL32IB Datasheet(HTML) 10 Page - Exar Corporation |
10 / 65 page XRT86VL32 7 DUAL T1/E1/J1 FRAMER/LIU COMBO - HARDWARE DESCRIPTION REV. V1.2.1 TRANSMIT SYSTEM SIDE INTERFACE SIGNAL NAME BALL# TYPE OUTPUT DRIVE(MA) DESCRIPTION TxSER0/ TxPOS0 TxSER2/ TxPOS2 D11 L18 I - Transmit Serial Data Input (TxSERn)/Transmit Positive Digital Input (TxPOSn): The exact function of these pins depends on the mode of opera- tion selected, as described below. DS1/E1 Mode - TxSERn These pins function as the transmit serial data input on the system side interface, which are latched on the rising edge of the TxSER- CLKn pin. Any payload data applied to this pin will be inserted into an outbound DS1/E1 frame and output to the line. In DS1 mode, the framing alignment bits, facility data link bits, CRC-6 bits, and signaling information can also be inserted from this input pin if configured appropriately. In E1 mode, all data intended to be transported via Time Slots 1 through 15 and Time slots 17 through 31 must be applied to this input pin. Data intended for Time Slots 0 and 16 can also be applied to this input pin If configured accord- ingly. DS1 or E1 High-Speed Multiplexed Mode* - TxSERn In this mode, these pins are used as the high-speed multiplexed data input pin on the system side. High-speed multiplexed data of channels 0-3 must be applied to TxSER0 in a byte or bit-inter- leaved way. The framer latches in the multiplexed data on TxSER0 using TxMSYNC/TxINCLK and demultiplexes this data into 4 serial streams. The LIU block will then output the data to the line interface using TxSERCLKn. DS1 or E1 Framer Bypass Mode - TxPOSn In this mode, TxSERn is used for the positive digital input pin (TxPOSn) to the LIU. NOTE: 1. *High-speed multiplexed modes include (For T1/E1) 16.384MHz HMVIP, H.100, Bit-multiplexed modes, and (For T1 only) 12.352MHz Bit-multiplexed mode. 2. In DS1 high-speed modes, the DS-0 data is mapped into an E1 frame by ignoring every fourth time slot (don’t care). 3. These 8 pins are internally pulled “High” for each channel. |
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