Hitachi IC25N040ATCS04-0 Specifications - Page 137

Word 48 49 50 51 52 53 54 55 56 57-58 59 60-61 62 63 Content Description 0000H * Capable of double word I/O, '0000'= cannot perform 0F00H Capabilities, bit assignments: 15-14(=0) Reserved 13(=0) Standby timer value are vendor specific 12(=0) Reserved 11(=1) IORDY Supported 10(=1) IORDY can be disabled 9(=1) Reserved 8(=0) Reserved * 7-0(=0) Reserved 4000H Capabilities 15(=0) 0=the contents of word 50 are valid 14(=1) 1=the contents of word 50 are valid 13- 1(=0) Reserved 0(=0) 1=the device has a minimum Standby timer value that is device specific 0200H * PIO data transfer cycle timing mode 0200H * DMA data transfer cycle timing mode Refer Word 62 and 63 0007H Validity flag of the word 15- 3(=0) Reserved 2(=1) 1=Word 88 is Valid 1(=1) 1=Word 64-70 are Valid 0(=1) 1=Word 54-58 are Valid XXXXH Number of current cylinders XXXXH Number of current heads XXXXH Number of current sectors per track XXXXH Current capacity in sectors Word 57 specifies the low word of the capacity 0XXXH Current Multiple setting. Bit assignments: 15- 9(=0) Reserved 8 1= Multiple Sector Setting is Valid 7- 0 xxh = Current setting for number of sectors (Note 1) Total Number of User Addressable Sectors Word 60 specifies the low word of the number 0000H * Reserved XX07H Multiword DMA Transfer Capability 15-11(=0) Reserved 10 1=Multiword DMA mode 2 is selected 9 1=Multiword DMA mode 1 is selected 8 1=Multiword DMA mode 0 is selected 7- 3(=0) Reserved 2 1=Multiword DMA mode 2 is supported 1 1=Multiword DMA mode 1 is supported 0 1=Multiword DMA mode 0 is supported * in Content field indicates the use of those parameters that are vendor specific. Note 1. See Figure 93. Figure 87. Identify device information. (Part 2 of 7) Hitachi Travelstar 60GH & 40GN hard disk drive specifications 124