
DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
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2 FEATURE
HIGHLIGHTS
2.1 General
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256-pin, 27mm BGA package
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1.8V and 3.3V supplies
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IEEE 1149.1 JTAG boundary scan
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Software access to device ID and silicon revision
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Development support includes evaluation kit, driver source code, and reference designs
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Reference design routes on a two-layer PC board
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Programmable output clocks for fractional T1, E1, H0, and H12 applications
2.2 Microprocessor Interface
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Parallel control port with 8-bit data bus
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Nonmultiplexed Intel and Motorola timing modes
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Internal software reset and external hardware reset-input pin
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Supports polled or interrupt-driven environments
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Software access to device ID and silicon revision
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Global interrupt-output pin
2.3 HDLC Ethernet Mapping
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Dedicated HDLC controller engine for protocol encapsulation
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Compatible with polled or interrupt driven environments
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Programmable FCS insertion and extraction
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Programmable FCS type
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Supports FCS error insertion
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Programmable packet size limits (Minimum 64 bytes and maximum 2016 bytes)
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Supports bit stuffing/destuffing
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Selectable packet scrambling/descrambling (X
43
+1)
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Separate FCS errored packet and aborted packet counts
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Programmable inter-frame fill for transmit HDLC
2.4 X.86
(Link Access Protocol for SONET/SDH) Ethernet Mapping
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Programmable X.86 address/control fields for transmit and receive
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Programmable 2-byte protocol (SAPI) field for transmit and receive
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32 bit FCS
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Transmit transparency processing—7E is replaced by 7D, 5E
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Transmit transparency processing—7D replaced by 7D, 5D
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Receive rate adaptation (7D, DD) is deleted.
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Receive transparency processing—7D, 5E is replaced by 7E
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Receive transparency processing—7D, 5D is replaced by 7D
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Receive abort sequence the LAPS packet is dropped if 7D7E is detect
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Self-synchronizing X
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+1 payload scrambling.
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Frame indication due to bad address/control/SAPI, FCS error, abort sequence or frame size longer
than preset max