Ultra Dma Data Burst Timing Requirements - Fujitsu MHM2100AT - Mobile 10 GB Hard Drive Product Manual

5.6.3.2 Ultra DMA data burst timing requirements

Table 5.18 Ultra DMA data burst timing requirements (1 of 2)
NAME MODE 0 MODE 1
(in ns)
MIN MAX MIN
t 240 160
2CYCTYP
t 112 73
CYC
t 230 154
2CYC
t 15 10
DS
t 5 5
DH
t 70 48
DVS
t 6 6
DVH
t 0 230 0
FS
t 0 150 0
LI
t 20 20
MLI
t 0 0
UI
t 10
AZ
t 20 20
ZAH
t 0 0
ZAD
t 20 70 20
ENV
t 50
SR
t 75
RFS
t 160 125
RP
t 20
IORDYZ
C141-E104-03EN
MODE 2
(in ns) (in ns)
MAX MIN MAX MIN
120 90
54 39
115 86
7 7
5 5
30 20
6 6
200 0 170 0
150 0 150 0
20 20
0 0
10 10
20 20
0 0
70 20 70 20
30 20
70 60
100 100
20 20
MODE 3 MODE 4
(in ns) (in ns)
MAX MIN MAX (see Notes 1 and 2)
60 Typical sustained average two cycle
time
25 Cycle time allowing for asymmetry
and clock variations (from
STROBE edge to STROBE edge)
57 Two cycle time allowing for clock
variations (from rising edge to next
rising edge or from falling edge to
next falling edge of STROBE)
5 Data setup time (at recipient)
(see Note 4)
5 Data hold time (at recipient)
(see Note 4)
6 Data valid setup time at sender (from
data valid until STROBE edge)
(see Note 5)
6 Data valid hold time at sender (from
STROBE edge until data may
become invalid) (see Note 5)
130 0 120 First STROBE time (for device to
first negate DSTROBE from STOP
during a data in burst)
100 0 100 Limited interlock time (see Note 3)
20 Interlock time with minimum
(see Note 3)
0 Unlimited interlock time (see Note 3)
10 10 Maximum time allowed for output
drivers to release (from asserted or
negated)
20 Minimum delay time required
for output
0 Drivers to assert or negate (from
released)
55 20 55 Envelope time (from DMACK- to
STOP and HDMARDY- during
data in burst initiation and from
DMACK to STOP during data out
burst initiation)
NA NA STROBE-to-DMARDY-time (if
DMARDY- is negated before this long
after STROBE edge, the recipient shall
receive no more than one additional
data word)
60 60 Ready-to-Final-STROBE time
(After negating DMARDY-,
STROBE edges should not be sent
beyond this period)
100 Ready-to-pause time (that recipient
shall wait to pause after negating
DMARDY-)
20 20 Maximum time before releasing IORDY
5.6 Timing
COMMENT
5-111