Host Terminating Read Dma; Figure 42. Ultra Dma Cycle Timings (Host Terminating Read) - IBM IC25N040ATCS04 - Travelstar 40 GB Hard Drive Specifications

7.9.3 Host Terminating Read DMA

DMARQ
DMACK-
STOP
HDMARDY-
DSTROBE
DD(15:0)
PARAMETER DESCRIPTION
tRFS HDMARDY- to final DSTROBE
time
tRP Ready to pause time
tLI Limited interlock time
Maximum time allowed for
tAZ
output drivers to release
tZAH Minimum 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 42. Ultra DMA cycle timings (Host Terminating Read)

tRP
tRFS
xxxxxxxxxxxxxxxxxx
xxx RD Data
Device drives DD
MODE 0
MIN
(ns)
160
20
20
15
20
Travelstar 60GH & 40GN hard disk drive specifications
tLI
tMLI
tLI tIORDYZ
tAZ
tZAH
MODE 1 MODE 2
MAX MIN MAX MIN
(ns) (ns) (ns) (ns)
– 75 – 70 –
– 125 – 100
0 150 0 150 0
– 10 – 10 –
– 20 – 20
– 20 – 20
– 10 – 7
5 – 5 – 5
– 20 – 20
– 20 – 20 –
52
tACK
tACK
tDH
tDS
xxx CRC xxxxxxxxxxx
Host drives DD
MODE 3 MODE 4
MAX MIN MAX MIN MAX
(ns) (ns) (ns) (ns) (ns)
60 – 60 – 60
– 100 – 100 –
150 0 100 0 100
10 – 10 – 10
– 20 – 20 –
– 20 – 20 –
– 7 – 5 –
– 5 – 5 –
– 20 – 20 –
20 – 20 – 20
MODE 5
MIN MAX
(ns) (ns)
– 50
85 –
0 75
– 10
20 –
20 –
4 –
4.6 –
20 –
– 20