參數(shù)資料
型號(hào): KL5KUSB121_L
廠商: Electronic Theatre Controls, Inc.
英文描述: USB to 10/100 Ethernet Controller
中文描述: USB接口10/100以太網(wǎng)控制器
文件頁(yè)數(shù): 13/17頁(yè)
文件大小: 310K
代理商: KL5KUSB121_L
KL5KUSB121
USB to 10/100 Ethernet Controller
Kawasaki LSI
2570 North First Street
Suite 301
San Jose, CA 95131
Tel: (408) 570-0555
Fax: (408) 570-0567
www.klsi.com
13
Ver. 1.1
PRELIMINARY
4.2 SRAM Write Access
Figure 4.2.1 SRAM Write AC Timing
Table 4.2.1 SRAM Write AC Characteristics (over recommended range)
Symbol
Parameter
Min
Typ
Max
Unit
Not
e
1,2
1,2
Twc
Fwc
SRAM write cycle
SRAM write frequency
31.25
32
ns
MH
z
Tdaw
SRAMWEN assert
delay
from SRAMA valid
SRAMA invalid delay
from SRAMWEN
negate
SRAMWEN assert
delay
from SRAMCSN assert
SRAMCSN negate
delay
from SRAMWEN
negate
SRAMWEN low width
SRAMD drive delay
from SRAMWEN
assert
SRAMD valid
from SRAMWEN
assert
SRAMD hold time
from SRAMWEN rise
Note: 1) Same as the USB to Ethernet internal clock cycle time 1T (31.25 ns).
2) Outputs are assumed to have 30pF external capacitive load.
0
ns
2
Tdwa
0
ns
2
Tdcw
0
ns
2
Tdwc
0
ns
2
Tpwe
Tdrv
25
ns
2
0
ns
2
Tval
15
ns
2
Tts
0
ns
2
SRAMA14-0
(OUT)
SRAMOEN
(OUT)
SRAMCSN
(OUT)
SRAMWEN
(OUT)
SRAMD7-0
(OUT)
Tdwa
valid
Twc
valid
Tpwe
Tts
Tdaw
Tdcw
Tdwc
Tval
Tdrv
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