Datasheet
T
T
T
r
r
r
a
a
a
n
n
n
s
s
s
c
c
c
e
e
e
n
n
n
d
d
d
4
4
4
0
0
0
-
-
-
P
P
P
i
i
i
n
n
n
I
I
I
D
D
D
E
E
E
F
F
F
l
l
l
a
a
a
s
s
s
h
h
h
M
M
M
o
o
o
d
d
d
u
u
u
l
l
l
e
e
e
T
T
T
S
S
S
1
1
1
2
2
2
8
8
8
M
M
M
~
~
~
1
1
1
6
6
6
G
G
G
D
D
D
O
O
O
M
M
M
4
4
4
0
0
0
V
V
V
-
-
-
S
S
S
Transcend Information Inc.
Ver 1.3
12
Ultra DMA Data Burst Timing Requirements
UDMA Mode 0
UDMA Mode 1
UDMA Mode 2
UDMA Mode 3
UDMA Mode 4
Name
Min Max Min
Max Min
Max Min Max Min Max
Measure location
(See Note 2)
t
2CYCTYP
240 160
120
90 60 Sender
t
CYC
112 73 54 39 25 Note 3
t
2CYC
230 153
115
86 57 Sender
t
DS
15.0 10.0
7.0 7.0 5.0 Recipient
t
DH
5.0 5.0 5.0 5.0 5.0 Recipient
t
DVS
70.0 48.0
31.0
20.0 6.7 Sender
t
DVH
6.2 6.2 6.2 6.2 6.2 Sender
t
CS
15.0 10.0
7.0 7.0 5.0 Device
t
CH
5.0 5.0 5.0 5.0 5.0 Device
t
CVS
70.0 48.0
31.0
20.0 6.7 Host
t
CVH
6.2 6.2 6.2 6.2 6.2 Host
t
ZFS
0 0 0 0 0 Device
t
DZFS
70.0 48.0
31.0
20.0 6.7 Sender
t
FS
230 200 170 130 120 Device
t
LI
0 150 0 150 0 150 0 100 0 100 Note 4
t
MLI
20 20 20 20 20 Host
t
UI
0 0 0 0 0 Host
t
AZ
10 10 10 10 10 Note 5
t
ZAH
20 20 20 20 20 Host
t
ZAD
0 0 0 0 0 Device
t
ENV
20 70 20 70 20 70 20 55 20 55 Host
t
RFS
75 70 60 60 60 Sender
t
RP
160 125
100
100 100 Recipient
t
IORDYZ
20 20 20 20 20 Device
t
ZIORDY
0 0 0 0 0 Device
t
ACK
20 20 20 20 20 Host
t
SS
50 50 50 50 50 Sender
Notes: All Timings in ns
(1) All timing measurement switching points (low to high and high to low) shall be taken at 1.5 V.
(2) All signal transitions for a timing parameter shall be measured at the connector specified in the measurement
location column. For example, in the case of t
RFS
, both STROBE and -DMARDY transitions are measured at the
sender connector.
(3) The parameter t
CYC
shall be measured at the recipient’s connector farthest from the sender.
(4) The parameter t
LI
shall be measured at the connector of the sender or recipient that is responding to an
incoming transition from the recipient or sender respectively. Both the incoming signal and the outgoing
response shall be measured at the same connector.
(5) The parameter t
AZ
shall be measured at the connector of the sender or recipient that is driving the bus but must
release the bus to allow for a bus turnaround.
(6) See Page 14 the AC Timing requirements in Ultra DMA AC Signal Requirements.