參數(shù)資料
型號(hào)： LAN91C96ITQFP
廠商： STANDARD MICROSYSTEMS CORP
元件分類： 微控制器/微處理器
英文描述： NON-PCI SINGLE-CHIP FULL DUPLES ETHERNET CONTROLLER
中文描述： 2 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100
封裝： 1 MM THICKNESS, TQFP-100
文件頁(yè)數(shù)： 66/110頁(yè)
文件大?。?/td> 655K
代理商： LAN91C96ITQFP
Non-PCI Single-Chip Full Duplex Ethernet Controller
Rev.
11/18/2004
Page 66
SMSC DS – LAN91C96I
DATASHEET
TX Interrupt With AUTO_RELEASE = FALSE
1. Save the Packet Number Register
Saved_PNR = Read
Byte
(Bank 2, Offset 2)
2. Read the EPH Status Register
Temp = Read (Bank 0, Offset 2)
3. Acknowledge TX Interrupt
Write
Byte
(0x02, (Bank 2, Offset C));
4. Check for Status of Transmission
If ( Temp AND 0x0001)
{
//If Successful Transmission
Step 4.1.1: Issue MMU Release (Release Specific Packet)
Write (0x00A0, (Bank2, Offset 0));
Step 4.1.2: Return from the routine
}
else
{
//Transmission has FAILED
// Now we can either release or re-enqueue the packet
Step 4.2.1: Get the packet to release/re-enqueue, stored in FIFO
Temp = Read (Bank 2, Offset 4)
Temp = Temp & 0x003F
Step 4.2.2: Write to the PNR
Write (Temp, (Bank2, Offset 2))
Step 4.2.3
// Option 1: Release the packet
Write (0x00A0, (Bank2, Offset 0));
//Option 2: Re-Enqueue the packet
Write (0x00C0, (Bank2, Offset 0));
Step 4.2.4: Re-Enable Transmission
Temp = Read(Bank0, Offset 0);
Temp = Temp2
OR
0x0001
Write (Temp2, (Bank 0, Offset 0));
Step 4.2.5: Return from the routine
}
5. Restore the Packet Number Register
Write
Byte
(Saved_PNR, (Bank 2, Offset 2))
Figure 8.3 – TX INTR
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