IBM IC25N040ATCS04 - Travelstar 40 GB Hard Drive - 7.9.4 Device Terminating Read DMA

7.9.4 Device Terminating Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tMLI
DD(15:0)
tZAH
xxxxxxxxxxxxxxxxxx
Device drives DD
Host drives DD
tDH
tDS
CRC
tACK
tACK
tLI
tIORDYZ
xxxxxx xxxxxxxxxx
tSS
tLI
tLI
tAZ
––20–20–20–20–20–
Maximum time before releasing
IORDY
tIORDYZ
–––20–20–20–20–20Hold time for DMACK-tACK
–4.6–5–5–5–5–5CRC word hold time at devicetDH
–4–5–7–7–10–15CRC word setup time at devicetDS
–20–20–20–20–20–20Interlock time with minimumtMLI
–20–20–20–20–20–20
Maximum delay time required
for output
tZAH
10–10–10–10–10–10–
Maximum time allowed for
output drivers to release
tAZ
75010001000150015001500Limited interlock timetLI
–50–50–50–50–50–50
Time from DSTROBE edge to
negation of DMARQ
tSS
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MAX
(ns)
MIN
(ns)
MODE 5MODE 4MODE 3MODE 2MODE 1MODE 0
PARAMETER DESCRIPTION
Figure 43. Ultra DMA cycle timings (Device Terminating Read)
Travelstar 60GH & 40GN hard disk drive specifications
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