PC8477BVF-1 datasheet(20/54 Pages) NSC

Part #	PC8477BVF-1

Description	Advanced Floppy Disk Controller

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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20 / 54 page

40 Command Set Description (Continued)

TLF11332 – 4

Notes

FE e Data Pattern of FE Clock Pattern of C7

All byte counts in decimal

FC e Data Pattern of FC Clock Pattern of D7

All byte values in hex

FB e Data Pattern of FB Clock Pattern of C7

Two byte CRC uses standard polynomial x16 a x12 a x5 a 1

F8 e Data Pattern of F8 Clock Pattern of C7

FM mode is not guaranteed through functional testing

A1 e Data Pattern of A1 Clock Pattern of 0A

Perpendicular Format GAP2 e 41 bytes for 1 Mbs

C2 e Data Pattern of C2 Clock Pattern of 14

All other data rates use GAP2 e 22 bytes

FIGURE 4-1 IBM Perpendicular and ISO Formats Supported by Format Command

20

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