Fujitsu MPD3173AT Product Manual - Page 83
Command descriptions
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5.3.2 Command descriptions The contents of the I/O registers to be necessary for issuing a command and the example indication of the I/O registers at command completion are shown as following in this subsection. Example: READ SECTOR(S) At command issuance (I/O registers setting contents) Bit 76543210 1F7H(CM) 1F6H(DH) 00100000 × L × DV Head No. / LBA [MSB] 1F5H(CH) 1F4H(CL) Start cylinder address [MSB] / LBA Start cylinder address [LSB] / LBA 1F3H(SN) Start sector No. / LBA [LSB] 1F2H(SC) Transfer sector count 1F1H(FR) xx At command completion (I/O registers contents to be read) Bit 76543210 1F7H(ST) 1F6H(DH) Error information × L × DV End Head No. / LBA [MSB] 1F5H(CH) 1F4H(CL) End cylinder address [MSB] / LBA End cylinder address [LSB] / LBA 1F3H(SN) End sector No. / LBA [LSB] 1F2H(SC) X'00' 1F1H(ER) Error information CM: Command register DH: Device/Head register CH: Cylinder High register CL: Cylinder Low register SN: Sector Number register SC: Sector Count register FR: Features register ST: Status register ER: Error register L: LBA (logical block address) setting bit DV: Device address. bit x, xx: Do not care (no necessary to set) 5 - 16 C141-E069-02EN
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