2 feature highlights, 1 general, 2 microprocessor interface – Maxim Integrated DS33R11 User Manual
Page 11: 3 hdlc ethernet mapping, Feature highlights, Eneral, Icroprocessor, Nterface, Hdlc e, Thernet
DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
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2 FEATURE
HIGHLIGHTS
2.1 General
• 256-pin, 27mm BGA package
• 1.8V and 3.3V supplies
• IEEE 1149.1 JTAG boundary scan
• Software access to device ID and silicon revision
• Development support includes evaluation kit, driver source code, and reference designs
• Reference design routes on a two-layer PC board
• Programmable output clocks for fractional T1, E1, H0, and H12 applications
2.2 Microprocessor Interface
• Parallel control port with 8-bit data bus
• Nonmultiplexed Intel and Motorola timing modes
• Internal software reset and external hardware reset-input pin
• Supports polled or interrupt-driven environments
• Software access to device ID and silicon revision
• Global interrupt-output pin
2.3 HDLC Ethernet Mapping
• Dedicated HDLC controller engine for protocol encapsulation
• Compatible with polled or interrupt driven environments
• Programmable FCS insertion and extraction
• Programmable FCS type
• Supports FCS error insertion
• Programmable packet size limits (Minimum 64 bytes and maximum 2016 bytes)
• Supports bit stuffing/destuffing
• Selectable packet scrambling/descrambling (X
43
+1)
• Separate FCS errored packet and aborted packet counts
• Programmable inter-frame fill for transmit HDLC
2.4 X.86
(Link Access Protocol for SONET/SDH) Ethernet Mapping
• Programmable X.86 address/control fields for transmit and receive
• Programmable 2-byte protocol (SAPI) field for transmit and receive
• 32 bit FCS
• Transmit transparency processing—7E is replaced by 7D, 5E
• Transmit transparency processing—7D replaced by 7D, 5D
• Receive rate adaptation (7D, DD) is deleted.
• Receive transparency processing—7D, 5E is replaced by 7E
• Receive transparency processing—7D, 5D is replaced by 7D
• Receive abort sequence the LAPS packet is dropped if 7D7E is detect
• Self-synchronizing X
43
+1 payload scrambling.
• Frame indication due to bad address/control/SAPI, FCS error, abort sequence or frame size longer
than preset max