K6602637
Rev.3
02.27.01
- 96 -
Figure 6-13 Initiating an Ultra DMA Write
DMARQ
(device)
DMACK-
(host)
STOP
(host)
DDMARDY-
(device)
HSTROBE
(host)
DD(15:0)
(host)
DA0, DA1, DA2,
CS0-, CS1-
t
UI
t
ACK
t
ENV
t
ZIORDY
t
LI
t
DVS
t
DVH
t
ACK
t
ACK
t
UI
t
DZFS
Note: The definitions for the STOP, DDMARDY and HSTROBE signal lines are not in effect until
DMARQ and DMACK are asserted.
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
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
LI
0
150
0
150
0
150
0
100
0
100
0
75
Limited interlock time
t
UI
0
0
0
0
0
0
Unlimited interlock
t
ENV
20
70
20
70
20
70
20
55
20
55
20
50
Envelope time
t
ZIORDY
0
0
0
0
0
0
Minimum time before
driving IORDY
t
ACK
20
20
20
20
20
20
Setup and hold times
before assertion and
negation of DMACK_
t
DZFS
70
48
31
20
6.7
25
Time from data output
released-to-driving until
the first transition of
critical timing
