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PC87309VLJ Datasheet(PDF) 78 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87309VLJ
Description  PC87309 SuperI/O Plug and Play Compatible Chip in Compact 100-Pin VLJ Packaging
PDF  192 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87309VLJ Datasheet(HTML) 78 Page - National Semiconductor (TI)

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The Floppy Disk Controller (FDC) (Logical Device 0)
78
www.national.com
3.8
EXAMPLE OF A FOUR-DRIVE CIRCUIT USING THE PC87309
Figure 3-6 shows one implementation of a four-drive circuit. Refer to TABLE 3-2 on page 39 to see how to encode the drive
and motor bits for this configuration.
FIGURE 3-6. PC87309 Four Floppy Disk Drive Circuit
PC87309
74LS139
7407 (2)
Hex Buffers
ICC = 40 mA
Open Collector
DR0
DR1
MTR0
G1
A1
B1
G2
A2
B2
1Y0
1Y1
1Y2
1Y3
2Y0
2Y1
2Y2
2Y3
Decoded Signal for Motor 3
Decoded Signal for Motor 2
Decoded Signal for Motor 1
Decoded Signal for Motor 0
Decoded Signal for Drive 3
Decoded Signal for Drive 2
Decoded Signal for Drive 1
Decoded Signal for Drive 0



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