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FDC37C78-HT Datasheet(PDF) 43 Page - Microchip Technology |
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FDC37C78-HT Datasheet(HTML) 43 Page - Microchip Technology |
43 / 82 page ![]() 43 PERPENDICULAR MODE DATA BUS PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0 REMARKS Command W 0 0 0 1 0 0 1 0 Command Codes OW 0 D3 D2 D1 D0 GAP WGATE INVALID CODES DATA BUS PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0 REMARKS Command W ───── Invalid Codes ───── Invalid Command Codes (NoOp - fdc goes into Standby State) Result R ─────── ST0 ─────── ST0 = 80H LOCK DATA BUS PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0 REMARKS Command W LOCK 0 0 1 0 1 0 0 Command Codes Result R 0 0 0 LOCK 0 0 0 0 SC is returned if the last command that was issued was the Format command. EOT is returned if the last command was a Read or Write. NOTE: These bits are used internally only. They are not reflected in the Drive Select pins. It is the user's responsibility to maintain correspondence between these bits and the Drive Select pins (DOR). |
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