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PC87393F Datasheet(PDF) 17 Page - National Semiconductor (TI) |
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PC87393F Datasheet(HTML) 17 Page - National Semiconductor (TI) |
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17 / 148 page ![]() 1.0 Signal/Pin Connection and Description (Continued) 17 www.national.com 1.4 PARALLEL PORT MULTIPLEXER (PPM) The Floppy Disk Controller (FDC) signals in Table 3 are directed to the associated Parallel Port (PP) pins either when the PNF signal is low and bits 6-5 of the SuperI/O Configuration 5 register (SIOCF5) are set to 01, or when the PNF signal is high and bits 6-5 are set to 10. Table 3. FDC Signals on Parallel Port Pins Parallel Port Pin FDC Signal PD0 INDEX PD1 TRK0 PD2 WP PD3 RDATA PD4 DSKCHG PD5 MSEN0 PD6 DRATE0 PD7 MSEN1 SLIN_ASTRB STEP AFD_DSTRB DENSEL/DRATE1 INIT DIR ACK DR1 ERR HDSEL SLCT WGATE PE WDATA BUSY_WAIT MTR1 |
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