Device Terminating Read Dma; Figure 43. Ultra Dma Cycle Timings (Device Terminating Read) - IBM IC25N040ATCS04 - Travelstar 40 GB Hard Drive Specifications

7.9.4 Device Terminating Read DMA

DMARQ
DMACK-
STOP
HDMARDY-
DSTROBE
DD(15:0)
Device drives DD
PARAMETER DESCRIPTION
tSS Time from DSTROBE edge to
negation of DMARQ
tLI Limited interlock time
tAZ Maximum time allowed for
output drivers to release
tZAH Maximum delay time required
for output
tMLI Interlock time with minimum
tDS CRC word setup time at device
tDH CRC word hold time at device
tACK Hold time for DMACK-
tIORDYZ Maximum time before releasing
IORDY

Figure 43. Ultra DMA cycle timings (Device Terminating Read)

tSS
tLI
tLI
tAZ
xxxxxx
tZAH
MODE 0
MIN
(ns)
50
0
–
20
20
15
5
20
–
Travelstar 60GH & 40GN hard disk drive specifications
tMLI
tIORDYZ
tLI
xxxxxxxxxxxxxxxxxx
Host drives DD
MODE 1 MODE 2
MAX MIN MAX MIN MAX
(ns) (ns) (ns) (ns) (ns)
– 50 – 50 –
150 0 150 0 150
10 – 10 – 10
– 20 – 20 –
– 20 – 20 –
– 10 – 7 –
– 5 – 5 –
– 20 – 20 –
20 – 20 – 20
53
tACK
tACK
tDH
tDS
xxxxxxxxxx
CRC
MODE 3 MODE 4 MODE 5
MIN MAX MIN MAX MIN
(ns) (ns) (ns) (ns) (ns)
50 – 50 – 50
0 100 0 100 0
– 10 – 10 –
20 – 20 – 20
20 – 20 – 20
7 – 5 – 4
5 – 5 – 4.6
20 – 20 – –
– 20 – 20 –
MAX
(ns)
–
75
10
–
–
–
–
–
–