AN983 ETC [List of Unclassifed Manufacturers], AN983 Datasheet - Page 62

• Manufacturer Part Number: AN983
• Description: PCI/miniPCI-to-Ethernet LAN Controller
• Manufacturer: ETC [List of Unclassifed Manufacturers]

8.3.3 TRANSMIT EARLY INTERRUPT SCHEME
place the 1st packet data into host memory
Rev. 1.8
FIFO-to-host memory operation (1st packet)
place the 2nd packet data into host memory
FIFO-to-host memory operation (2nd packet)
place the 3rd packet data into host memory
FIFO-to-host memory operation (3rd packet)
Driver return buffer to upper layer
Transmit data from FIFO to Media
Normal Interrupt after Transmit
Completed
Driver return buffer to upper layer
Early Interrupt after Host to TX-
FIFO Operation Completed
Host to TX-FIFO Memory
Operation
issue transmit demand
Fig - 11 Transmit normal interrupt and early interrupt comparison
check point
check point
Transmit enable
Fig - 10 Transmit data flow of pre-fetch data
time
AN983B
time
handled by driver
handled by driver
www.admtek.com.tw
ADMtek Inc.
transmit threshold
1st packet
PCI/miPCI Fast Ethernet Controller with integrated PHY
check the next
packet
IFG
1st packet is
transmitted, check
the 3rd packet
handled by AN983B
handled by AN983B
The saved time when transmit
early interrupt is implemented
2nd packet
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