K6602637
Rev.3
02.27.01
- 92 -
Figure 6-9 Sustained Ultra DMA Read Data
t
DVH
DSTROBE
at device
DD(15:0)
at device
DSTROBE
at host
DD(15:0)
at host
t
DVH
t
CYC
t
CYC
t
DVS
t
DVS
t
DH
t
DS
t
DH
t
DS
t
2CYC
t
DH
t
DVH
t
2CYC
t
DVHIC
t
DVSIC
t
DVHIC
t
DVSIC
t
DVHIC
t
DHIC
t
DSIC
t
DHIC
t
DSIC
t
DHIC
Note: DD(15:0) and DSTROBE signals are shown at both the host and the device to emphasize that cable settling
time as well as cable propagation delay shall not allow the data signals to be considered stable at the host until
some time after they are driven by the device.
Mode 0(ns) Mode 1(ns) Mode 2(ns) Mode3(ns) Mode4(ns)
Mode5(ns)
Description
SYMBOL
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN
MAX
t
CYC
112
73
54
39
25
16.8
Cycle time allowing for
asymmetry and clock
variation
t2
CYC
230
153
115
86
57
38
Two cycle time allowing for
clock variation
t
DS
15
10
7
7
5
4
Data setup time at recipient
t
DH
5
5
5
5
5
4.6
Data hold time at recipient
t
DVS
70
48
31
20
6.7
4.8
Data valid setup time at
sender
t
DVH
6.2
6.2
6.2
6.2
6.2
4.8
Data valid hold time at
sender
t
DSIC
14.7
9.7
6.8
6.8
4.8
2.3
Recipient IC data setup time
t
DHIC
4.8
4.8
4.8
4.8
4.8
2.8
Recipient IC data hold time
t
DVSIC
72.9
50.9
33.9
22.6
9.5
6.0
Sender IC data valid setup
time
t
DVHIC
9.0
9.0
9.0
9.0
9.0
6.0
Sender IC data valid hold
time
