Ultra Dma Data Burst Timing Requirements - Fujitsu MHN2100AT - Mobile 10 GB Hard Drive Product Manual

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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) (in ns)
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
240 160
t
2CYCTYP
t 112 73
CYC
230 153
t
2CYC
15 10
t
DS
5 5
t
DH
70 48
t
DVS
6.2 6.2
t
DVH
15 10
t
CS
5 5
t
CH
t 70 48
CVS
t 6.2 6.2
CVH
0 0
t
ZFS
70 48
t
DZFS
230
t
FS
5-114
MODE 2 MODE 3
(in ns) (in ns)
120 90
54 39
115 86
7 7
5 5
31 20
6.2 6.2
7 7
5 5
31 20
6.2 6.2
0 0
31 20
200 170 130
MODE 4 MODE 5
(in ns) (in ns)
60 40 Typical sustained average two
cycle time
25 16.8 Cycle time allowing for
asymmetry and clock variations
(from STROBE edge to STROBE
edge)
57 38 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 4 Data setup time at recipient (from
data valid until STROBE edge)
(*2), (*5)
5 4.6 Data hold time at recipient (from
STROBE edge until data may
become invalid) (*2), (*5)
6.7 4.8 Data valid setup time at sender
(from data valid until STROBE
edge) (*3)
6.2 4.8 Data valid hold time at sender
(from STROBE edge until data
may become invalid) (*3)
5 5 CRC word setup time at device
(*2)
5 5 CRC word hold time device (*2)
6.7 10 CRC word valid setup time at
host (from CRC valid until
DMACK-negation) (*3)
6.2 10 CRC word valid hold time at
sender (from DMACK-negation
until CRC may become invalid)
(*3)
0 35 Time from STROBE output
released-to-driving until the first
transition of critical timing
6.7 25 Time from data output released-
to-driving until the first transition
of critical timing
120 90 First STROBE time (for device to
first negate DSTROBE from
STOP during a data in burst)
COMMENT
C141-E120-02EN