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FDC37M607 Datasheet(PDF) 172 Page - SMSC Corporation |
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FDC37M607 Datasheet(HTML) 172 Page - SMSC Corporation |
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172 / 182 page  172 timing for the dynamic driver change is specified in then IEEE 1284 Extended Capabilities Port Protocol and ISA Interface Standard, Rev. 1.14, July 14, 1993, available from Microsoft. The dynamic driver change must be implemented properly to prevent glitching the outputs. FIGURE 16 - PARALLEL PORT FIFO TIMING NAME DESCRIPTION MIN TYP MAX UNITS t1 DATA Valid to nSTROBE Active 600 ns t2 nSTROBE Active Pulse Width 600 ns t3 DATA Hold from nSTROBE Inactive (Note 1) 450 ns t4 nSTROBE Active to BUSY Active 500 ns t5 BUSY Inactive to nSTROBE Active 680 ns t6 BUSY Inactive to PDATA Invalid (Note 1) 80 ns Note 1: The data is held until BUSY goes inactive or for time t3, whichever is longer. This only applies if another data transfer is pending. If no other data transfer is pending, the data is held indefinitely. t3 t6 t1 t2 t5 t4 PDATA nSTROBE BUSY |
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