LAN91C100FD_0601 Datasheet, PDF (47/78 Pages) SMSC Corporation – FEAST Fast Ethernet Controller with Full Duplex Capability

FEAST Fast Ethernet Controller with Full Duplex Capability
TX INTR
Save Pkt Number Register
Read TXDONE Pkt # from
FIFO Ports Reg.
Write Into Packet Number
Register
Write Address Pointer Register
Read Status Word from RAM
Yes
TX Status
No
OK?
Update Statistics
Re-Enable TXENA
Immediately Issue "Release"
Command
Update Variables
Acknowledge TXINTR
Read TX INT Again
No
TX INT = 0?
Yes
Restore Packet Number
Return to ISR
Figure 5.5 - TX INTR
SMSC DS – LAN91C100FD Rev. D
Page 47
DATASHEET
Rev. 01-20-06