參數(shù)資料
型號: AX88796L
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): 55/71頁
文件大小: 931K
代理商: AX88796L
ASIX ELECTRONICS CORPORATION
55
AX88796 L 3-in-1 Local Bus Fast Ethernet Controller
7.4 A.C. Timing Characteristics
7.4.1 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
7.4.2 Reset Timing
LCLK/XTALIN
RESET
/RESET
Symbol
Trst
Reset pulse width
Warning
: Some chips may needed long power down for successful PHY auto
negotiation
Root of cause:
The PHY inside of AX88796 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.
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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