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TMS320DM6443
Digital Media System-on-Chip
SPRS282E–DECEMBER 2005–REVISED MARCH 2007
6.11.2.3
ATA/CF Ultra DMA Timing
Table 6-41. Timings for ATA/CF Module — Ultra DMA AC Timing
(1)(2)
(see
Figure 6-28
through
Figure 6-37
)
-594
NO.
UNIT
MODE
0-4
0
1
2
3
4
0-4
MIN
25
240
160
120
90
60
MAX
28
f
(SYSCLK5)
Operating frequency, SYSCLK5
MHz
ns
ns
ns
ns
ns
ns
1
t
2CYCTYP
Typical sustained average two cycle time
2
t
CYC
Cycle time, Strobe edge to Strobe edge
Two cycle time, rising to rising edge or falling to
falling edge
(UDMASTB + 1)P
3
t
2CYC
0-4
2(UDMASTB + 1)P
ns
0
1
15
10
7
5
5
70
48
31
20
6.7
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
4
t
DS
Data setup, data valid before STROBE edge
2-3
4
0-4
0
1
2
3
4
5
t
DH
Data hold, data valid after STROBE edge
Data valid
INPUT
setup time, data valid before
STROBE
6
t
DVS
Data valid
OUTPUT
setup time, data valid before
STROBE
Data valid
INPUT
hold time, data valid after
STROBE
Data valid
OUTPUT
hold time, data valid after
STROBE
CRC word valid setup time at host, CRC valid
before DMACK negation
CRC word valid hold time at sender, CRC valid
after DMACK negation
Time from STROBE output released-to-driving
until the first transition of critical timing
0-4
(UDMASTB)P - 3.1
ns
0-4
6.2
ns
7
t
DVH
0-4
1P - 2
ns
10
t
CVS
0-4
(UDMASTB)P
ns
11
t
CVH
0-4
2P
ns
12
t
ZFS
0-4
0
ns
0
1
2
3
4
0
1
2
3
4
70
48
31
20
6.7
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Time from data output released-to-driving until
the first transition of critical timing
13
t
DZFS
230
200
170
130
120
14
t
FS
First STROBE time
(1)
(2)
P = SYSCLK5 period, in ns, for ATA. For example, when running the DSP CPU at 594 MHz, use P = 10.1 ns.
UDMASTB equals the value programmed in the UDMSTBxP bit field in the UDMASTB register. UDMATRP equals the value
programmed in the UDMTRPxP bit field in the UDMATRP register. TENV equals the value programmed in the UDMATNVxP bit field in
the UDMATENV register. For more detailed information, see the
TMS320DM644x DMSoC ATA Controller User's Guide
(literature
number
SPRUE21
).
Peripheral and Electrical Specifications
146
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