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SH7052 датащи(PDF) 158 Page - Renesas Technology Corp |
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SH7052 датащи(HTML) 158 Page - Renesas Technology Corp |
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158 / 919 page ![]() 132 When the wait is specified by software using WCR, the wait input WAIT signal from outside is sampled. Figure 8.5 shows the WAIT signal sampling. The WAIT signal is sampled at the clock rise one cycle before the clock rise when the Tw state shifts to the T2 state. When using external waits, use a WCR setting of 1 state or more when extending CS assertion, and 2 states or more otherwise. T1 TW CK Read Write Address CSn WAIT RD Data WRH, WRL Data TW TW0 T2 Figure 8.5 Wait State Timing of External Space Access (Two Software Wait States + WAIT Signal Wait State) |
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