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參數(shù)資料
| 型號： | AX88796 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 3-in-1 Local Bus Fast Ethernet Controller |
| 中文描述： | 3合1本地總線快速以太網(wǎng)控制器 |
| 文件頁數(shù)： | 31/71頁 |
| 文件大?。?/td> | 931K |
| 代理商： | AX88796 |
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ASIX ELECTRONICS CORPORATION
31
AX88796 L 3-in-1 Local Bus Fast Ethernet Controller
4.2.5 Other Useful Operations
MEMORY DIAGNOSTICS
Memory diagnostics can be achieved by Remote Write/Read DMA operations. The following is a suggested step
for memory test and assume the AX88796 has been well initilized.
1. Issue the STOP command to the AX88796. This is accomplished be setting the STP bit in the AX88796's
Command Register. Writing 21H to the Command Register will stop the AX88796.
2. Wait for at least 1.5 ms. Since the AX88796 will complete any reception that is in progress, it is necessary to
time out for the maximum possible duration of an Ethernet reception. This action prevents buffer memory
from written data through Local DMA Write.
3. Write data pattern to MUT (memory under test) by Remote DMA write operation.
4. Read data pattern from MUT (memory under test) by Remote DMA read operation.
5. Compare the read data pattern with original write data pattern and check if it is equal.
6. Repeat step 3 to step 5 with various data pattern.
LOOPBACK DIAGNOSTICS
1. Issue the STOP command to the AX88796. This is accomplished be setting the STP bit in the AX88796's
Command Register. Writing 21H to the Command Register will stop the AX88796.
2. Wait for at least 1.5 ms. Since the AX88796 will complete any reception that is in progress, it is necessary to
time out for the maximum possible duration of an Ethernet reception. This action prevents buffer memory
from written data through Local DMA Write.
3. Place the AX88796 in mode 1 loopback. (MAC internal loopback) This can be accomplished by setting bits
D2 and D1, of the Transmit Configuration Register to ``0,1''.
4. Issue the START command to the AX88796. This can be accomplished by writing 22H to the Command
Register. This is necessary to activate the AX88796's Remote DMA channel.
5. Write data that want to transmit to transmit buffer by Remote DMA write operation.
6. Issue the TXP command to the AX88796. This can be accomplished by writing 26H to the Command
Register.
7. Read data current receive buffer by Remote DMA read operation.
8. Compare the received data with original transmit data and check if it is equal.
9. Repeat step 5 to step 8 for more packets test.
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PDF描述 |
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| AX88796L | 3-in-1 Local Bus Fast Ethernet Controller |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AX88796ALF | 制造商:ASIX 功能描述:10/100 MAC,COMMERCIAL 128PIN |
| AX88796BLF | 制造商:Asix Electronics 功能描述:IEEE802.3 / IEEE802.3u LAN standard Ethernet 3.3V 64LQFP Tray 制造商:ASIX 功能描述:10/100 MAC,COMMERCIAL 64PIN |
| AX88796BLI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High-Performance Non-PCI Single-Chip 8/16 bit 10/100M Fast Ethernet Controller |
| AX88796C | 制造商:ASIX 制造商全稱:ASIX 功能描述:Low-Power SPI or Non-PCI Ethernet Controller |
| AX88796CLF | 制造商:ASIX Electronics Corporation 功能描述: |
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