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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PC87311AVF 데이터시트(PDF) 31 Page - National Semiconductor (TI) |
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PC87311AVF 데이터시트(HTML) 31 Page - National Semiconductor (TI) |
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31 / 78 page  40 FDC Command Set Description (Continued) TABLE 4-1 Typical Format Gap Length Values Mode Sector Sector EOT Sector Format Size Code Gap GAP3 Decimal Hex Hex Hex Hex 125 kbs 128 00 12 07 09 FM 128 00 10 10 19 256 01 08 18 30 512 02 04 46 87 1024 03 02 C8 FF 2048 04 01 C8 FF 250 kbs 256 01 12 0A 0C MFM 256 01 10 20 32 512 02 08 2A 50 512 02 09 2A 50 1024 03 04 80 F0 2048 04 02 C8 FF 4096 05 01 C8 FF 250 kbs 128 00 1A 07 1B FM 256 01 0F 0E 2A 512 02 08 1B 3A 1024 03 04 47 8A 2048 04 02 C8 FF 4096 05 01 C8 FF 500 kbs 256 01 1A 0E 36 MFM 512 02 0F 1B 54 512 02 12 1B 6C 1024 03 08 35 74 2048 04 04 99 FF 4096 05 02 C8 FF 8192 06 01 C8 FF Note FM mode is not guaranteed through functional testing Typical Values for PC Compatible Diskette Media Media Sector Sector EOT Sector Format Type Size Code Gap GAP3 Decimal Hex Hex Hex Hex 360k 512 02 09 2A 50 12M 512 02 0F 1B 54 720k 512 02 09 1B 50 144M 512 02 12 1B 6C 288M 512 02 24 1B 53 Note 1 Sector Gap refers to the Intersector Gap Length parameter specified in the Command Phase of the Read Write Scan and Verify commands Although this is the recommended value the FDC treats this byte as a don’t care in the Read Write Scan and Verify commands Note 2 Format Gap is the suggested value to use in the Format Gap parameter of the Format command This is the programmable GAP3 as shown in Figure 4-1 Note 3 The 288M diskette media is a Barium Ferrite media intended for use in Perpendicular Recording drives at the data rate of up to 1 Mbs 31 |
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