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參數(shù)資料
| 型號： | AX88790L |
| 廠商： | ASIX Electronics Corporation |
| 英文描述： | 10/100BASE 3-in-1 PCMCIA Fast Ethernet Controller |
| 中文描述： | 一個10/100Base 3合1的PCMCIA快速以太網(wǎng)控制器 |
| 文件頁數(shù)： | 41/60頁 |
| 文件大?。?/td> | 633K |
| 代理商： | AX88790L |
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ASIX ELECTRONICS CORPORATION
41
AX88790 L 3-in-1 PCMCIA Fast Ethernet Controller
6.4 A.C. Timing Characteristics
6.4.1 XTAL / CLOCK
LCLK/XTALIN
Tr
CLKO
Tod
Symbol
Tcyc
CYCLE TIME
Thigh
CLK HIGH TIME
Tlow
CLK LOW TIME
Tr/Tf
CLK SLEW RATE
Tod
LCLK/XTALIN TO CLKO OUT DELAY
6.4.2 Reset Timing
LCLK
RESET
Symbol
Trst
Reset pulse width
Note:
Some chips may need long power down for successful PHY auto negotiation
Root of cause:
The PHY inside of AX88790 has a special request due to the semiconductor’s process. Namely,
it needs a very long power down for successful Auto Negotiation for some chips. We made a test
in lab and found it would be no problem if the PHY's initial time kept for 2 sec
for all chips
.
If the
power down is less then this number, some of the PHY's Auto Negotiation will not be complete
and there will be potential to cause the link fail. If the auto negotiation time is not long enough,
uncertain numbers of chip may not work properly.
Countermeasure:
Following actions on chip initialization will fix the problem of long auto negotiation.
1. Set the PHY register MR0 with 0x800h (1000,0000,0000) -- bit 11 of MR0 to '1'
(Power down Mode).
2. Wait for 2.5 sec
Tf
Tlow
Description
Min
16
16
1
Typ.
40
20
20
-
10
Max
24
24
4
Units
ns
ns
ns
ns
Description
Min
100
Typ.
-
Max
-
Units
LClk
Tcyc
Thigh
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| AX88796BLI | Low-pin-count Non-PCI 8/16-bit 10/100M Fast Ethernet Controller |
| AX88872P | 10/100BASE Dual Speed “Swipeater” Controller |
| AX9902MS | 2N and 2P-Channel Enhancement Mode Power MOSFET |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AX88796 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3-in-1 Local Bus Fast Ethernet Controller |
| 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 |
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