AT INTERFACE DESCRIPTION
5 – 4
DMA Timing
DMA Timing
DMA Timing
DMA Timing
DMA Timing
T IMIN G PARAMET ERS
MODE 0
MODE 1
MODE 2
t0
Cycle Ti me ( min)
480 ns
150 ns
120 ns
tC
DMAC K to DMARQ delay
tD
DIOR-/D IOW- (min )
215 ns
80 ns
70 ns
tE
DIOR- data a cce ss (min)
150 ns
60 ns
tF
DIOR- data hold (min )
5 ns
5 ns
5 ns
tG
DIOR-/DIOW- data setup ( min)
100 ns
30 ns
20 ns
tH
DIOW- d ata hold ( min)
20 ns
15 ns
10 ns
tI
DM AC K to DIOR-/D IOW - se tup (min)
0
0
0
tJ
DIOR-/DIOW- to DMAC K ho ld ( min )
20 ns
5 ns
5 ns
tKr
DIOR- neg ated p uls e wi dth (min )
50 ns
50 ns
25 ns
tKw
D IOW - nega ted puls e wid th ( min )
215 ns
50 ns
25 ns
tLr
DIOR- to D MARQ delay (ma x)
120 ns
40 ns
35 ns
tL w
DIOW- to D MARQ de la y (max)
40 ns
40 ns
35 ns
tZ
DMAC K- to tr ista te (max)
20 ns
25 ns
25 ns
Figure 5 - 3
Multi-word DMA Data Transfer