Deskstar T7K500 Hard Disk Drive Specification
35
6.9.4 Device Terminating Read DMA
Table 25: Ultra DMA cycle timing chart (Host pausing Read)
Table 26: Ultra DMA cycle timings (Device Terminating Read)
PARAMETER DESCRIP-
TION
(all values in ns)
MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
tSS Time from DSTROBE edge
to negation of DMARQ
50–50–50–50–50–50–50–
tLI Limited interlock time 015001500150010001000 75 0 60
tAZ Maximum time allowed for
output drivers to release
–10–10–10–10–10–10–10
tZAH Maximum delay time
required for output
20–20–20–20–20–20–20–
tMLI Interlock time with minimum20–20–20–20–20–20–20–
tCS CRC word setup time at
device
15–10–7–7–5–5–5–
tCH CRC word hold time at
device
5–5–5–5–5–5–5–
tACK Hold time for DMACK- 20–20–20–20–20–20–20–
tIORDYZ Maximum time before
releasing IORDY
–20–20–20–20–20–20–20
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tMLI
DD(15:0)
tZAH
xxxxxxxxxxxxxxxxxx
Device drives DD
Host drives DD
tCH
tCS
CRC
tACK
tACK
tLI
tIORDYZ
xxxxxx xxxxxxxxxx
tSS
tLI
tLI
tAZ