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FDC37N972 Datasheet(PDF) 32 Page - SMSC Corporation |
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FDC37N972 Datasheet(HTML) 32 Page - SMSC Corporation |
32 / 390 page 32 TABLE 11 - SRA - PS/2 MODEL 30 MODE 7 6 5 4 3 2 1 0 INT PENDING DRQ STEP F/F TRK0 NHDSE L INDX WP nDIR RESET COND. 0 0 0 N/A 1 N/A N/A 1 BIT 0 nDIRECTION Active low status indicating the direction of head movement. A logic "0" indicates inward direction; a logic "1" indicates outward direction. BIT 1 WRITE PROTECT Active high status of the WRITE PROTECT disk interface input. A logic "1" indicates that the disk is write protected. BIT 2 INDEX Active high status of the INDEX disk interface input. BIT 3 nHEAD SELECT Active low status of the HDSEL disk interface input. A logic "0" selects side 1 and a logic "1" selects side 0. BIT 4 TRACK 0 Active high status of the TRK0 disk interface input. BIT 5 STEP Active high status of the latched STEP disk interface output pin. This bit is latched with the STEP output going active, and is cleared with a read from the DIR register, or with a hardware or software reset. BIT 6 DMA REQUEST Active high status of the FDC’s DRQ output pin. BIT 7 INTERRUPT PENDING Active high bit indicating the state of the Floppy Disk Interrupt output. |
Número de pieza similar - FDC37N972 |
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Descripción similar - FDC37N972 |
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