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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HD6417618A датащи(PDF) 217 Page - Renesas Technology Corp |
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HD6417618A датащи(HTML) 217 Page - Renesas Technology Corp |
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217 / 646 page  Section 7 Bus State Controller (BSC) Rev. 6.00 Jun. 12, 2007 Page 185 of 610 REJ09B0131-0600 Basic Timing for Memory Card Interface: Figure 7.31 shows the basic timing of the PCMCIA IC memory card interface. If areas 5 and 6 in the physical space are specified as the PCMCIA interface, accessing the common memory areas in areas 5 and 6 automatically accesses with the IC memory card interface. If the external bus frequency (CKIO) increases, the setup times and hold times for the address pins (A25 to A0), card enable signals ( CE1A, CE2A, CE1B, CE2B), and write data (D15 to D0) to the RD and WE signals become insufficient. To prevent this error, this LSI can specify the setup times and hold times for areas 5 and 6 in the physical space independently, using CS5BWCR and CS6BWCR. In the PCMCIA interface, as in the normal space interface, a software wait or hardware wait can be inserted using the WAIT pin. Figure 7.32 shows the PCMCIA memory bus wait timing. Tpcm1w CKIO A25 to A0 CExx RD/ WR RD D15 to D0 WE D15 to D0 BS Read Write Tpcm2 Tpcm1 Tpcm1w Tpcm1w Figure 7.31 Basic Access Timing for PCMCIA Memory Card Interface |
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