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SMC032AF 数据表(PDF) 28 Page - Numonyx B.V |
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SMC032AF 数据表(HTML) 28 Page - Numonyx B.V |
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28 / 82 page  Command interface SMCxxxAF 28/82 The timing diagram for True IDE mode of operation in this section is drawn using the conventions in the ATA-4 specification, which are different than the conventions used in the PCMCIA specification and earlier versions of this specification. Signals are shown with their asserted state as High regardless of whether the signal is actually negative or positive true. Consequently, the -IORD, the -IOWR and the -IOCS16 signals are shown in the diagram inverted from their electrical states on the bus. Figure 8. True IDE mode I/O timing diagram 1. The device addresses consists of −CS0, −CS1, and A2-A0. 2. The Data I/O consist of D15-D0 (16 bit) or D7-D0 (8 bit). 3. −IOCS16 is shown for PIO modes 0, 1 and 2. For other modes, this signal is ignored. A0-A2, −CS0, −CS1(1) ADDRESS VALID −IORD/−IOWR Write Data D0-D15(2) Read Data D0-D15(2) −IOCS16(3) ai10086b t0 t1 t2 t9 t8 t2i t3 t4 t7 t5 t6 t6z VALID VALID |
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