HD63265 Floppy Disk Controller Users Manual 2ed Mar89 - Bitsavers

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Command issue startNoYesThe STR must bechecked duringthe T2 stateshown infigure 6-63.-YesYesYesNoWait for0.6 ].ls (a-inchmode) or 1. 2 11s(5-inch mode)Write commandparameterNoYesNoYesCommand executionFigure 6-64.STR Checking Procedure82 HITACHI
ABORT Command Issue (valid for all commands except SLEEP)Whether or not the FDC accepts a command can be determined by checking the BSYbit of the STR 0.6 ~s (8-inch mode) or 1.2 ~s (5-inch mode) after the TXR bithas been set.If a command is issued during period A shown in figures 6-60 and 6-61, the BSYbit is cleared 0.6 ~s (8-inch mode) or 1.2 ~s (5-inch mode) after the TXR bithas been set. In addition, if a command is issued during period B shown infigures 6-60 and 6-61, the BSY bit is always cleared after the TXR bit has beenset.Therefore, if the BSY bit is cleared 0.6 ~s (8-inch mode) or 1.2 ~s (5-inchmode) after the TXR bit has been set, the command must be issued again afterthe ABORT command has been issued.If BSY is set 0.6 ~s (8-inch mode) or 1.2 ~s (5-inch mode) after the TXR bithas been set, the FDC has accepted a command correctly and the next process,such as parameter transfer, can be performed.Figure 6-65 shows the ABORT command issue procedure.HITACHI 83
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Hitachi 8-Bit MicrocomputerHD63265F
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CONTENTSSection 1.General Descripti
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SECTION 1.GENERAL DESCRIPTION1.1 IN
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. Maximum drive control range:- Num
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SECTION 2.PIN DESCRIPTION2.1 PIN CO
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Table 2-1.TypePin FunctionsPin No.D
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RS(Register Select): RS selects the
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They must be tied to low.NC(No Conn
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Bit 4BSY (Controller Busy): Bit 4 i
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During DMA transfer, in which the F
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During polling, if the ready signal
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A: Auto precompensationWhen A = 1,
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6.2.6 ESN: End Sector NumberFigure
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6.2.12 STEP: Stepo o o o o o S T E
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HOUT: HDUT specifies the time to wa
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6.2.17 PCl, PCO: Precompensation De
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INC (Interrupt Code): INC (figure 6
Page 37 and 38: DDA (Deleted Data Address Mark): DD
Page 39 and 40: Commands other than CHECK related a
Page 41 and 42: The above commands do not activate
Page 43 and 44: READ, WRITE,COMPARE commandRead a r
Page 45 and 46: CHECK DEVICEWrite a commandparamete
Page 47 and 48: SPECIFY 1, 2corrunandwrite a corrun
Page 49 and 50: 6.5 COMMAND FUNCTIONS6.5.1 READ DAT
Page 51 and 52: egister within the periods shown in
Page 53 and 54: 6.5.2 READ DELETED DATABit D7 D6 D5
Page 55 and 56: CA byte does not match, only the IN
Page 57 and 58: 6.5.5 WRITE DATABi t D7 D6 D5 D4 D3
Page 59 and 60: HEX 00 is written for the remaining
Page 61 and 62: 6.5.7 WRITE FORMATBi t D7 D6 D5 D4-
Page 63 and 64: 6.5.8 SEEKBit D7 D6 D5 D4- D3 D2 Dl
Page 65 and 66: 6.5.9 RECALIBRATEBit D7 D6 D5 D4- D
Page 67 and 68: Table 6-13.Data Overrun Times8"/S"
Page 69 and 70: 6.5.11 COMPARE LOW OR EQUALBit D7 D
Page 71 and 72: 6.5.13 CHECK DEVICE STATUSBit D7 D6
Page 73 and 74: 6.5.15 SPECIFY 1Bit D7 I D6 I D5 I
Page 75 and 76: 6.5.17 SLEEPBi t D7I D6 I D5 I D4-
Page 77 and 78: 6.5.19 READ LONGBit D7 D6 D5 D4- D3
Page 79 and 80: 6.5.21 INVALIDBit D'jI D6 I Ds I DI
Page 81 and 82: 6.7 Command Code Rejection6.7.1 Phe
Page 83 and 84: Command Rejection Timing Condition
Page 85 and 86: 6.7.2 CountermeasuresHitachi recomm
Page 87: STR Check (valid for all commands e
Page 91 and 92: SECTION 7.VFO CIRCUITThe VFO circui
Page 93 and 94: Reset FDCFDC's operationReset SYNC
Page 95 and 96: SECTION 8.WRITE PRECOMPENSATION CIR
Page 97 and 98: 9.2 SYSTEM OPERATION SEQUENCEFigure
Page 99 and 100: 9.3.2 WRITE OperationFigure 9-4 sho
Page 101 and 102: Table 9-1.FDC Data Transfer Timing8
Page 103 and 104: 9.5 FDC CONTROL9.5.1 FDC Operating
Page 105 and 106: CSRS (Ao )RDWRDATAtAH(min)PVVimL On
Page 107 and 108: Since the DACK signal of the FDC ca
Page 109 and 110: 9.6.2 68-Series 8-Bit Bus SystemFig
Page 111 and 112: R/W, CS and RS are sampled at the r
Page 113 and 114: Table 9-3Data Transfer Rate Selecti
Page 115 and 116: HD63265 (FDC)WDATA~----------------
Page 117 and 118: Table 9-5.8" FDD Interface Signals
Page 119 and 120: Table 9-7.3.5" FDD Interface Signal
Page 121 and 122: 10.3 ELECTRICAL CHARACTERISTICS10.3
Page 123 and 124: AC Specification (cant)No. Item Sym
Page 125 and 126: ~ReadcycleWritecycleRS,C S00-07(out
Page 127 and 128: @tususa. US1. HDIRtupSTEPFigure 10-
Page 129 and 130: 5.0V2.4 kQIS2074 ®All diodesare 1S
Page 131 and 132: HD63265 User's ManualPublication Da
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HD63265 Floppy Disk Controller Users Manual 2ed Mar89 - Bitsavers

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