
DS33Z41 Quad IMUX Ethernet Mapper
8 of 167
2 FEATURE
HIGHLIGHTS
2.1 General
•
169-pin, 14mm x 14mm CSBGA package
•
1.8V supply with 3.3V tolerant inputs and outputs
•
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
2.2 Link
Aggregation
(Inverse Multiplexing)
•
Link aggregation for up to 4 T1/E1 Links
•
8.192Mbps IBO interface to Dallas Semiconductor Framers/Transceivers
•
Differential delay compensation up to 7.75ms for the 4 T1/E1 links
•
Handshaking protocol between local and distant end for establishment of aggregation
2.3 HDLC
•
HDLC controller engine
•
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 Committed Information Rate (CIR) Controller
•
CIR controller limits transmission of data from the Ethernet Interface to the Serial Interface.
•
CIR granularity at 512kbps
•
CIR Averaging for smoothing traffic peaks
2.5 X.86
Support
•
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.