Example transfer periods and rates for fast scsi-2 – Avago Technologies LSI53C825AE User Manual
Page 121
Operating Registers
4-33
and
show examples of possible bit
combinations.
Table 4.4
Examples of Synchronous Transfer
Periods and Rates for SCSI-1
CLK
(MHz)
SCSI
CLK
÷
SCNTL3
Bits [6:4] XFERP
Synch.
Transfer
Period (ns)
Synch.
Send Rate
(Mbytes)
Synch.
Receive
Rate
(Mbytes)
66.67
3
4
180
5.55
5.55
66.67
3
5
225
4.44
5.55
50
2
4
160
6.25
6.25
50
2
5
200
5
6.25
40
2
4
200
5
5
37.50
1.5
4
160
6.25
6.25
33.33
1.5
4
180
5.55
5.55
25
1
4
160
6.25
6.25
20
1
4
200
5
5
16.67
1
4
240
4.17
4.17
Table 4.5
Example Transfer Periods and Rates for
Fast SCSI-2
CLK
(MHz)
SCSI
CLK
÷
SCNTL3
Bits [6:4] XFERP
Synch.
Transfer
Period
(ns)
Synch.
Transfer
Rate
(Mbytes)
Synch.
Receive
Transfer
Rate
(Mbytes)
66.67
1.5
4
90
11.11
11.11
66.67
1.5
5
112.5
8.88
11.11
50
1
4
80
12.5
12.5
50
1
5
100
10.0
12.5
40
1
4
100
10.0
10.0
37.50
1
4
106.67
9.375
9.375
33.33
1
4
120
8.33
8.33
25
1
4
160
6.25
6.25
20
1
4
200
5
5
16.67
1
4
240
4.17
4.17