lan83c175 Standard Microsystems Corp., lan83c175 Datasheet - Page 23

• Manufacturer Part Number: lan83c175
• Description: Ethernet Cardbus Integrated Controller With Modem Support Corporation
• Manufacturer: Standard Microsystems Corp.

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FRAME
FIGURE 4 - RECEIVE LOCKAHEAD BUFFERING FLOW
TRUE
FALSE
READ DESCRIPTOR
READ DESCRIPTOR
RDMA STOPPED
(RXQUEUED=0)
COPY HEADER
POST STATUS
COPY FRAME
POST STATUS
NEXTFRAME
NEXTFRAME
OWNER
OWNER
WAIT
WAIT
NIC
23
NIC
TRUE
FALSE
(HEADER BIT CLEARED)
HOST/CLEAR RXQUEUED
RXQUEUED SET
DONE/SET RCC
HOST/CLEAR RXQUEUED
NO
DONE/CLEAR RXQUEUED SET HCC
YES
HEADER BIT SET
RXQUEUED SET
RESET