LAN83C171 Ver la hoja de datos (PDF) - SMSC -> Microchip

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LAN83C171

EPIC/XF ACPI/PC 97 Compliant Integrated PCI 10/100 Mbps Fast Ethernet Controller

SMSC -> Microchip 

Figure 4 shows an example of the Receive

Buffer Structure and also shows a flow

diagram for the Receive Buffering Method.

RX LENGTH/STATUS

BUFFER ADDRESS

CONTROL/BUF LENGTH

NEXT DESCR. ADDRESS

FRAME 1 STATUS

HEADER = 1

FRAME 1 HEADER

FRAME DATA

RX LENGTH/STATUS

FRAGLIST ADDRESS

CONTROL/OFFSET

NEXT DESCR. ADDRESS

NUMBER FRAGS

PTR1(FRAG LENGTH)

FRAG LENGTH(PTR1)

FRAGLIST = 1

RX LENGTH/STATUS

FRAGLIST ADDRESS

CONTROL/OFFSET

PTRn(FRAG LENGTHn)

FRAG LENGTHn(PTRn)

FRAME 1 STATUS/LENGTH

NEXT DESCR. ADDRESS

FRAGLIST = 1

FRAME 1

RX LENGTH/STATUS

FRAME 2 STATUS/LENGTH

BUFFER ADDRESS

CONTROL/BUF LENGTH

HEADER = 1

NEXT DESCR. ADDRESS

FRAME DATA

FRAME DATA

FIGURE 4 - RECEIVE BUFFER STRUCTURE

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