7.6 Bus Phases
C156-E228-02EN 7-35
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 Value
Transter
rate
REQ/ACK Offset
1 to 16
X '0C'
(50 ns)
Max.
20.0 MB/s*
1
X '12'
(75 ns)
Max.
13.3 MB/s*
1
X '19'
(100 ns)
Max.
10.0 MB/s*
1
X '25'
(150 ns)
Max.
6.6 MB/s*
1
X '32'
(200 ns)
Max.
5.0 MB/s*
1
X '3E'
(250 ns)
Max.
4.0 MB/s*
1
Transfer Period
(Minimum REQ Interval sent
from ODD)
(T1 in Figure 7.21)
X '4B'
(300 ns)
Max.
3.3 MB/s*
1
*1.
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.
Figure 7.17
Data transfer rate in synchronous mode
Summary of Contents for MCM3064SS
Page 1: ...C156 E228 02EN MCM3064SS MCM3130SS MCP3064SS MCP3130SS OPTICAL DISK DRIVES PRODUCT MANUAL ...
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Page 42: ...Specifications 2 12 C156 E228 02EN Figure 2 3 Example of alternate processing ...
Page 47: ...3 2 Mounting Requirements C156 E228 02EN 3 5 Figure 3 2 Outer dimensions 1 of 2 ...
Page 49: ...3 2 Mounting Requirements C156 E228 02EN 3 7 Figure 3 3 Outer dimensions 1 of 3 ...
Page 51: ...3 2 Mounting Requirements C156 E228 02EN 3 9 Figure 3 3 Outer dimensions 3 of 3 ...
Page 82: ...Installation 4 16 C156 E228 02EN Figure 4 6 SCSI connection check ...
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Page 148: ...SCSI BUS 7 46 C156 E228 02EN Figure 7 21 Bus phase sequence 1 of 2 ...
Page 149: ...7 8 Bus Sequence C156 E228 02EN 7 47 Figure 7 21 Bus phase sequence 2 of 2 ...
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