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HD6417618 Datasheet(PDF) 217 Page - Renesas Technology Corp

Part # HD6417618
Description  32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
PDF  646 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6417618 Datasheet(HTML) 217 Page - Renesas Technology Corp

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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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