參數(shù)資料
型號(hào): GL811S
廠商: Genesys Logic, Inc.
英文描述: USB 2.0 to ATA/ATAPI Bridge Controller
中文描述: USB 2.0至的ATA / ATAPI控制器橋
文件頁數(shù): 27/37頁
文件大?。?/td> 958K
代理商: GL811S
GL811S USB2.0 to ATA/ATAPI Bridge Controller
2007 Genesys Logic Inc. - All rights reserved.
Page 27
6.4.3 Ultra DMA data transfer
Table 6.5 - Ultra DMA data burst timing requirements
Mode 0
(in ns)
Mode 1
(in ns)
Mode 2
(in ns)
Mode 3
(in ns)
Mode 4
(in ns)
Name
min
max
min
max
min
max
min
max
Min
max
Comment
t
2CYCTYP
240
160
120
90
60
Typical sustained average
two cycle time
Cycle time allowing for
asymmetry and clock
variations
Two cycle time allowing
for clock variations
Data setup time at
recipient
t
CYC
112
73
54
39
25
t
2CYC
230
154
115
86
57
t
DS
15
10
7
7
5
t
DH
5
5
5
5
5
Data hold time at recipient
t
DVS
70
48
30
20
6
Data valid setup time at
sender
Data valid hold time at
sender
t
DVH
6
6
6
6
6
t
FS
0
230
0
200
0
170
0
130
0
120
First STORBE time
t
LI
0
150
0
150
0
150
0
100
0
100
Limited interlock time
t
MLI
20
20
20
20
20
Interlock time with
minimum
t
UI
0
0
0
0
0
Unlimited interlock time
t
AZ
10
10
10
10
10
Maximum time allowed
for output drivers to
release
Minimum delay time
required for output
t
ZAH
20
20
20
20
20
t
ZAD
0
0
0
0
0
Drivers to assert or negate
t
ENV
20
70
20
70
20
70
20
55
20
55
Envelope time
t
SR
50
30
20
NA
NA
STROBE to DMARDY_
time
Ready to final STROBE
time
Minimum time to assert
STOP or negate DMARQ
Maximum time before
releasing IORDY
Minimum time before
driving STROBE
Setup and hold times for
DMACK_
Time from STROBE edge
to negation of DMARQ or
assertion of STOP
t
RFS
75
70
60
60
60
t
RP
160
125
100
100
100
t
IORDYZ
20
20
20
20
20
t
ZIORDY
0
0
0
0
0
t
ACK
20
20
20
20
20
t
SS
50
50
50
50
50
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