Table 6-23 Multiword Dma Data Transfer - Samsung SP0401N Product Manual

Multiword DMA timing parameters
t Cycle time
0
t DIOR-/DIOW-
D
t DIOR- data access
E
t DIOR- data hold
F
t DIOR-/DIOW- data setup
G
t DIOW- data hold
H
t DMACK to DIOR-/DIOW- setup
I
t DIOR-/DIOW- to DMACK hold
J
t DIOR- negated pulse width
KR
t DIOW- negated pulse width
KW
t DIOR- to DMARQ delay
LR
t DIOW- to DMARQ delay
LW
t CS(1:0) valid to DIOR-/DIOW-
M
t CS(1:0) hold
N
t DMACK- to tri-state
Z
NOTE − t
is the minimum total cycle time, t
0
is the minimum command recovery time or command inactive time. The actual cycle time equals the sum of the actual
command active time and the actual command inactive time. The three timing requirements of t
The minimum total cycle time requirement, t
may lengthen either or both t
data. A device implementation shall support any legal host implementation.
SpinPoint P80 Product Manual Rev. 01

Table 6-23 Multiword DMA data transfer

(min)
(min)
(max)
(min)
(min)
(min)
(min)
(min)
(min)
(min)
(max)
(max)
(min)
(min)
(max)
is the minimum command active time, and t
D
, is greater than the sum of t
0
or t to ensure that t is equal to the value reported in the devices IDENTIFY DEVICE
D K 0
Mode 0 Mode 1
ns ns
480 150
215 80
150 60
5 5
100 30
20 15
0 0
20 5
50 50
215 50
120 40
40 40
50 30
15 10
20 25
and t . This means a host implementation
D K
Mode 2 Note
ns
120 see note
70 see note
50
5
20
10
0
5
25 see note
25 see note
35
35
25
10
25
(t or t , as appropriate)
K KR KW
, t , t shall be met.
0 D K
99