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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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MFC2000 Scheda tecnica(PDF) 339 Page - List of Unclassifed Manufacturers |
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MFC2000 Scheda tecnica(HTML) 339 Page - List of Unclassifed Manufacturers |
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339 / 426 page  Hardware Description MFC 2000 Multifunctional Peripheral Controller 2000 100723A Conexant 17-17 17.5.2 Nibble Mode Timing The Nibble mode is the most common way to get reverse channel from printer or peripheral. This mode is usually combined with the compatibility mode or a proprietary forward channel mode to create a complete bi-direction channel. The Nibble Mode Phase transitions: 1. Host signal ability to take data by asserting AUTOFDn low 2. Peripheral responses by placing first nibble on status lines(FAULTn,SLCTOUT,PE and BUSY) 3. Peripheral signals valid nibble by asserting ACKn low 4. Host sets AUTOFDn high to indicate that it has received the nibble and is not ready for another nibble. 5. Peripheral set ACKn high for the second nibble. AUTOFDn ACKn FAULTn SLCTOUT PE BUSY BITS[1:4] BITS[5:8] Figure 17-3. Nibble Mode Data Transfer Cycle |
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