Figure 9. Multiword Dma Timing - Seagate ST5660A Product Manual

ST5660A Product Manual, Rev. A
The drive operates at multiword DMA mode 1 timing specifications, as
shown below.
DMARQ
DMACK−
DIOR− or DIOW−
Read data valid
Write data valid
TI

Figure 9. Multiword DMA timing

Time Description
T0 Cycle time
TD DIOW– or DIOR– pulse width (16-bit)
TE DIOR– data access
TF DIOW– data hold
TG DIOR– data setup
TH DIOW– data hold
TI DMACK– to DIOR– or DIOW– setup
TJ DIOR– or DIOW– to DMACK– hold
TK DIOR– negated pulse width
R
TK DIOW– negated pulse width
W
TL DIOR– to DMARQ delay
R
TL DIOW– to DMARQ delay
W
TE TF
TG TH TL
TD TK
T0
Min
150 nsec
80 nsec
5 nsec
30 nsec
15 nsec
0 nsec
5 nsec
60 nsec
60 nsec
29
TJ
Max
—
—
— 60 nsec
—
—
—
—
—
—
—
— 120 nsec
— 40 nsec