LAN91C111 Datasheet, PDF (86/125 Pages) SMSC Corporation – 10/100 Non-PCI Ethernet Single Chip MAC + PHY

LAN91C111
FIGURE 10-6:
INTERRUPT GENERATION FOR TRANSMIT, RECEIVE, MMU
INTERRUPT
STATUS REGISTER
RCV
INT
PACKET NUMBER
REGISTER
TWO
OPTIONS
TX EMPTY
INT
TX
INT
ALLOC
INT
TX
FIFO
'EMPTY'
TX COMPLETION
FIFO
'NOT EMPTY'
TX DONE
PACKET NUMBER
CPU ADDRESS
'NOT EMPTY'
RX FIFO
PACKET NUMBER
RX
FIFO
RX PACKET
NUMBER
CSMA ADDRESS
M.S. BIT ONLY
LOGICAL PACKET #
ADDRESS
PACK # OUT
MMU
PHYSICAL ADDRESS
CSMA/CD
RAM
 2011-2016 Microchip Technology Inc.
DS00002276A-page 87