Toshiba ESTUDIO170F, Руководство по обслуживанию

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January 2005 © TOSHIBA TEC e-STUDIO170F Circuit Description
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7.3.16 PC I/F Circuit
Fig.7-34
The PC I/F circuit consists of the USB controller (IC49) as the central component and connects this
machine with the PC through the USB interface for communication of image data and control signals.
With the machine connected to the PC, PC facsimile transmission by which the data transferred from
the PC are transmitted to the telephone line, PC facsimile reception by which the data received from the
telephone line are transferred to the PC, and use of the PC scanner by which a document is scanned
by the machine and the data are transferred to the PC are enabled. This machine can also be used as
a printer.
To connect the PC to the machine, connect one end of the USB cable to CN22 and connect the other
end to the USB port of the PC.
The USB controller monitors the status of the VBUS signal. When this signal is changed from LOW to
HIGH level, the USB controller judges that the PC is connected, and when this signal is changed from
HIGH to LOW level, it judges that the PC is disconnected.
Communication data between the USB controller and the PC is transferred or received through the D-
and D+ signals.
Signal Name Type Active Description Destination
VBUS I - USB Vbus signal PC
D-, D+ I/O - USB data signals PC
IC49
USB controller
IC15
ASIC
(Engine controller)
PC
2
1
3
3
5
4
4
VBUS
CPD0-15
USB
Main PBA
D+
D-
CN22