參數(shù)資料
型號: 97CFDC
廠商: SMSC Corporation
英文描述: USB FLOPPY DISK CONTROLLER
中文描述: 軟盤控制器的USB
文件頁數(shù): 5/20頁
文件大?。?/td> 143K
代理商: 97CFDC
SMSC DS – USB97CFDC
Page 13
Rev. 12/15/2000
FA[0:19
]
FD [7:0
nFR D
nFW R
t1
t5
t3
t4
t2
FIGURE 2 – FLASH READ TIMING
Table 3 – Flash Read Timing
NAME
PARAMETER
MIN
TYP
MAX
UNITS
t1
FA[14:0] Address setup time to nFRD asserted
40
ns
t2
nFRD pulse width
110
ns
t3
FD[7:0] Data setup time to nFRD de-asserted
30
ns
t4
FD[7:0] Data hold time from nFRD de-asserted
0
ns
t5
FA[14:0] Address hold time from nFRD de-asserted
35
ns
FIGURE 3 – SRAM MEMORY WRITE TIMING
Table 4 – SRAM Memory Write Timing
NAME
PARAMETER
MIN
TYP
MAX
UNITS
t1
SA[19:0] valid before nMEMWR asserted
10
ns
t2
nMEMWR pulse width
100
ns
t3
SD[7:0] Data setup time to nMEMWR de-asserted
50
ns
t4
SD[7:0] Data hold time from nMEMWR de-asserted
10
ns
t5
nMEMWR de-asserted to SA[13:0] invalid
10
ns
SA [1 3 :0
S D [7 :0
nM E M W
t1
t5
t3
t4
t2
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