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H8/3003 数据表(PDF) 140 Page - Renesas Technology Corp |
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H8/3003 数据表(HTML) 140 Page - Renesas Technology Corp |
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140 / 715 page ![]() Pin Wait Mode 0: The wait state controller is disabled. Wait states can only be inserted by WAIT pin control. During access to an external three-state-access area, if the WAIT pin is low at the fall of the system clock (ø) in the T2 state, a wait state (TW) is inserted. If the WAIT pin remains low, wait states continue to be inserted until the WAIT signal goes high. Figure 6-12 shows the timing. Figure 6-12 Pin Wait Mode 0 ø pin Address bus Data bus AS RD HWR Data bus , LWR T1 T2 TW TW T3 Inserted by signal Write data ** * Read data Read access Write access External address WAIT WAIT Note: Arrows indicate time of sampling of the pin. * WAIT 122 |
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