Table 7.9 Parameters Used For Synchronous Data Transfer - Fujitsu MCM3064SS Product Manual

1) If (n T1) (T2 + 700),
Average data transfer rate in SCSI = 1000/T1 (MB/s)
2) If (n T1) (T2 + 700),
Average data transfer rate in SCSI = (n 1000)/(T2 + 700) (MB/s)
where,
n: Value assigned to REQ/ACK Offset parameter
T1: Value in ns assigned to Transfer Period parameter (see Table 7.9)
T2: Average time in ns from REQi pulse transmission to corresponding ACKi
response at the pertinent pins of the SCSI connector on the ODD

Table 7.9 Parameters used for synchronous data transfer

Parameter
REQ/ACK Offset
Transfer Period
(Minimum REQ Interval sent
from ODD)
(T1 in Figure 7.21)
*1.
Figure 7.17
C156-E228-02EN
X '0C'
X '12'
X '19'
X '25'
X '32'
X '3E'
X '4B'
If a single-ended SCSI bus is used, the maximum transfer rate must be
specified considering the bus configuration, the number of connected SCSI
devices, and transmission characteristics.
Data transfer rate in synchronous mode
Value
1 to 16
(50 ns) Max.
(75 ns) Max.
(100 ns) Max.
(150 ns) Max.
(200 ns) Max.
(250 ns) Max.
(300 ns) Max.
7.6 Bus Phases
Transter rate
1
20.0 MB/s*
1
13.3 MB/s*
1
10.0 MB/s*
1
6.6 MB/s*
1
5.0 MB/s*
1
4.0 MB/s*
1
3.3 MB/s*
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