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FDC37C78-HT Datasheet(PDF) 22 Page - Microchip Technology |
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FDC37C78-HT Datasheet(HTML) 22 Page - Microchip Technology |
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22 / 82 page  22 STATUS REGISTER ENCODING During the Result Phase of certain commands, the Data Register contains data bytes that give the status of the command just executed. Table 14 - Status Register 0 BIT NO. SYMBOL NAME DESCRIPTION 7,6 IC Interrupt Code 00 - Normal termination of command. The specified command was properly executed and completed without error. 01 - Abnormal termination of command. Command execution was started, but was not successfully completed. 10 - Invalid command. The requested command could not be executed. 11 - Abnormal termination caused by Polling. 5 SE Seek End The FDC completed a Seek, Relative Seek or Recalibrate command (used during a Sense Interrupt Command). 4 EC Equipment Check The TRK0 pin failed to become a "1" after: 1. 80 step pulses in the Recalibrate command. 2. The Relative Seek command caused the FDC to step outward beyond Track 0. 3 Unused. This bit is always "0". 2 H Head Address The current head address. 1,0 DS1,0 Drive Select The current selected drive. |
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