DS33Z11 Maxim Integrated Products, DS33Z11 Datasheet - Page 57

• Manufacturer Part Number: DS33Z11
• Description: Network Controller & Processor ICs Ethernet Mapper Ethe rnet-Serial TDM Ethe
• Manufacturer: Maxim Integrated Products

Specifications of DS33Z11

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS33Z11 Ethernet Mapper
8.18 X.86 Encoding and Decoding
X.86 protocol provides a method for encapsulating Ethernet Frame onto LAPS. LAPS provides HDLC type
framing structure for encapsulation of Ethernet frames. LAPS encapsulated frames can be used to send data
onto a SONET/SDH network. The DS33Z11 expects a byte synchronization signal to provide the byte boundary
for the X.86 receiver. This is provided by the RBSYNC pin. The functional timing is shown in
Figure
10-4. The
X.86 transmitter provides a byte boundary indicator with the signal TBSYNC. The functional timing is shown in
Figure
10-3. Note that in some cases, additional logic may be required to meet RBSYNC/TBSYNC sychronization
timing requirements when operating in X.86 mode.
Figure 8-12 LAPS Encoding of MAC Frames Concept
IEEE
802.3 MAC Frame
LAPS
Rate Adaption
SDH
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