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LPC47M14X データシート(PDF) 49 Page - SMSC Corporation |
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LPC47M14X データシート(HTML) 49 Page - SMSC Corporation |
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49 / 205 page ![]() SMSC DS – LPC47M14X Page 49 Rev. 03/19/2001 READ ID DATA BUS PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0 REMARKS Command W 0 MFM 0 0 1 0 1 0 Commands W 0 0 0 0 0 HDS DS1 DS0 Execution The first correct ID information on the Cylinder is stored in Data Register Result R ST0 Status information after Command execution. Disk status after the Command has completed R ST1 R ST2 R C R H R R R N 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 Stand- by 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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