Toshiba E-STUDIO520 - Page 417

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March 2005 © TOSHIBA TEC e-STUDIO520/600/720/850 REVERSING AUTOMATIC DOCUMENT FEEDER (RADF)
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2) RXD / SCN-STR / DF_ACK / DF_REQ signals
Fig.16-104
This is an input circuit to communicate with the copier. “1” substitutes 5 V and “0” substitutes 0 V.
The same logic is used in both the connector and CPU output port.