PC8477BVF-1 datasheet(34/54 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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34 / 54 page

50 Functional Description (Continued)

The PLL will remain locked to the crystal

for 4 byte times before asserting Read Gate

TLF11332 – 6

FIGURE 5-2 Read Data AlgorithmState Machine

250 kbs

TLF11332 – 7

300 kbs

TLF11332 – 8

500 kbs

TLF11332 – 9

1 Mbs

TLF11332 – 10

FIGURE 5-3 PC8477B Dynamic Window Margin Performance

(Typical performance at VCC e 50V 25 C)

34

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