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MFC2000 Datasheet(PDF) 342 Page - List of Unclassifed Manufacturers |
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MFC2000 Datasheet(HTML) 342 Page - List of Unclassifed Manufacturers |
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342 / 426 page  MFC2000 Multifunctional Peripheral Controller 2000 Hardware Description 17-20 Conexant 100723A 17.5.4.2 Reverse ECP Transfer Handshake 1. The host requests a reverse channel transfer by setting INITn low. 2. The peripheral signals that it is OK to proceed by setting PE low. 3. The peripheral places data on the data lines and indicates a data cycle by setting BUSY high. 4. The peripheral asserts ACKn low to indicate valid data. 5. The host acknowledges by setting AUTOFDn high. 6. The peripheral sets ACKn high to clock the data in to the host. 7. The host sets AUTOFDn low to indicate that it is ready for the next byte. 8. The cycle repeats, but this time it is a command cycle because ACKn is low. INITn PE OPPID[7:0] DATA ACKn AUTOFDn BUSY Figure 17-6. Reverse ECP Transfer Timing |
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