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PC87309 Datasheet(PDF) 5 Page - National Semiconductor (TI) |
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PC87309 Datasheet(HTML) 5 Page - National Semiconductor (TI) |
5 / 192 page 5 Table of Contents www.national.com 3.3.1 Status Register A (SRA) .............................................................................................. 38 3.3.2 Status Register B (SRB) .............................................................................................. 39 3.3.3 Digital Output Register (DOR) ..................................................................................... 39 3.3.4 Tape Drive Register (TDR) .......................................................................................... 41 3.3.5 Main Status Register (MSR) ........................................................................................ 42 3.3.6 Data Rate Select Register (DSR) ................................................................................ 43 3.3.7 Data Register (FIFO) ................................................................................................... 43 3.3.8 Digital Input Register (DIR) .......................................................................................... 44 3.3.9 Configuration Control Register (CCR) ......................................................................... 45 3.4 THE PHASES OF FDC COMMANDS ....................................................................................... 45 3.4.1 Command Phase ......................................................................................................... 45 3.4.2 Execution Phase .......................................................................................................... 45 3.4.3 Result Phase ............................................................................................................... 47 3.4.4 Idle Phase .................................................................................................................... 47 3.4.5 Drive Polling Phase ..................................................................................................... 48 3.5 THE RESULT PHASE STATUS REGISTERS .......................................................................... 48 3.5.1 Result Phase Status Register 0 (ST0) ......................................................................... 48 3.5.2 Result Phase Status Register 1 (ST1) ......................................................................... 49 3.5.3 Result Phase Status Register 2 (ST2) ......................................................................... 49 3.5.4 Result Phase Status Register 3 (ST3) ......................................................................... 50 3.6 FDC REGISTER BITMAPS ....................................................................................................... 51 3.6.1 Standard ...................................................................................................................... 51 3.6.2 Result Phase Status .................................................................................................... 52 3.7 COMMAND SET ....................................................................................................................... 53 3.7.1 Abbreviations Used in FDC Commands ...................................................................... 54 3.7.2 The CONFIGURE Command ...................................................................................... 55 3.7.3 The DUMPREG Command ......................................................................................... 55 3.7.4 The FORMAT TRACK Command ............................................................................... 56 3.7.5 The INVALID Command .............................................................................................. 58 3.7.6 The LOCK Command .................................................................................................. 60 3.7.7 The MODE Command ................................................................................................. 60 3.7.8 The NSC Command .................................................................................................... 62 3.7.9 The PERPENDICULAR MODE Command ................................................................. 62 3.7.10 The READ DATA Command ....................................................................................... 64 3.7.11 The READ DELETED DATA Command ...................................................................... 66 3.7.12 The READ ID Command ............................................................................................. 67 3.7.13 The READ A TRACK Command ................................................................................. 68 3.7.14 The RECALIBRATE Command ................................................................................... 68 3.7.15 The RELATIVE SEEK Command ................................................................................ 69 3.7.16 The SCAN EQUAL, the SCAN LOW OR EQUAL and the SCAN HIGH OR EQUAL Commands .................................................................................................................. 69 3.7.17 The SEEK Command .................................................................................................. 70 3.7.18 The SENSE DRIVE STATUS Command .................................................................... 71 3.7.19 The SENSE INTERRUPT Command .......................................................................... 71 3.7.20 The SET TRACK Command ........................................................................................ 72 3.7.21 The SPECIFY Command ............................................................................................ 73 3.7.22 The VERIFY Command ............................................................................................... 74 |
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