Host Terminating Read Dma; Figure 45. Ultra Dma Cycle Timing (Host Terminating Read) - IBM IC25N020ATDA04 - Travelstar 20 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
tCS CRC word setup time at device
tCH CRC word hold time at device
tACK Hold time for DMACK-
tIORDYZ Maximum time before releasing
IORDY

Figure 45. Ultra DMA cycle timing (Host Terminating Read)

tRP
tRFS
xxxxxxxxxxxxxxxxxx
xxx RD Data
Device drives DD
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
tLI
tLI tIORDYZ
tAZ
tZAH
MODE 0 MODE 1 MODE 2
MIN MAX MIN MAX MIN
(ns) (ns) (ns) (ns) (ns)
– 75 – 70 –
160 – 125 – 100
0 150 0 150 0
– 10 – 10 –
20 – 20 – 20
20 – 20 – 20
15 – 10 – 7
5 – 5 – 5
20 – 20 – 20
– 20 – 20 –
56
tMLI
tACK
tACK
tCH
tCS
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