K6602743
Rev.2
02.12.’02
- 100 -
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
