K6610170
Rev.2
Dec 22, 2004
- 137 -
Figure 8.8 Host terminating an Ultra DMA Read
t
C V H
C R C
t
A Z
D M A R Q
(d e vic e )
D M A C K -
(h o s t)
S T O P
(h o s t)
H D M A R D Y -
(h o s t)
D S T R O B E
(d e vic e )
D D (1 5 :0 )
D A 0 , D A 1 , D A 2 ,
C S 0 -, C S 1 -
t
A C K
t
M L I
t
L I
t
L I
t
IO R D Y Z
t
A C K
t
A C K
t
Z A H
t
M L I
t
C V S
t
R F S
t
R P
Note: The definitions for the STOP, HDMARDY and DSTROBE signal lines are no longer in effect after
DMARQ and DMACK are negated.
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
CVS
70 48 31 20 6.7 10
CRC
word
valid
setup
time
at sender
t
CVH
6.2 6.2 6.2 6.2 6.2 10 CRC
word
valid
hold
time
at
sender
t
LI
0 150 0 150 0 150 0 100 0 100 0 75
Limited
interlock
time
t
MLI
20 20 20 20 20 20
Interlock
time
with
minimum
t
AZ
10 10 10 10 10 10
Maximum
time
allowed
for
output drivers to release
t
ZAH
20 20 20 20 20 20
Minimum
delay
time
for
output drivers turning on
t
RFS
75 70 60 60 60 50
Ready-to-final-STROBE
time
t
RP
160 125 100 100 100 85 Ready-to-pause
time
t
IORDYZ
20 20 20 20 20 20
Maximum
time
before
releasing IORDY
t
ACK
20 20 20 20 20 20
Setup
and
hold
times
before assertion and
negation of DMACK_
