Canon FAXPHONE L75 Manuel de service Page 35

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LASER CLASS 1060P Chapter 1: General Description
Encoding/Decoding the Data
In USB, data transfer lines are ultimately encoded with NRZI (Non Return to Zero Invert) method. When
the original data bit is 0, sent data bits are inverted; when the original data bit is 1, the value is retained.
However, if the level of the transferred data remain unchanged for a certain period of time, the receiving
side may not be able to synchronize with the data sample position, which will result in data bits being out
of phase. This is prevented by a method called bit stuffing; when data bit 1 is repeated 6 times, one 0 bit
is added to the original data before encoded with NRZI.
Figure 1-5 NRZI
2.7.3 Supported Software
The following table shows the relationship between available drivers and the interfaces for this model.
LASER CLASS 1060P Suite
Parallel I/F USB I/F
Windows 95/98 fully conditionally
supported supported*
Windows NT 4.0 fully not
supported supported
Windows 2000 fully fully
supported supported
Windows Me support is scheduled support is scheduled
by way of upgrading by way of upgrading
*: Support for USB is provided, and the operation is guaranteed, with Windows98 computers.
Windows Drivers
Win95.98 LBP Printer Driver (IEEE 1284 compatible 8-bit parallel & USB supported)
WinNT4.0 LBP Printer Driver (IEEE 1284 compatible 8-bit parrallel supported)
Win2000 LBP Printer Driver (IEEE 1284 compatible 8-bit parallel & USB supported)
Idle
Idle
NRZI
0110101000100110
Data
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