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H83069RF Datasheet(PDF) 191 Page - Renesas Technology Corp |
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H83069RF Datasheet(HTML) 191 Page - Renesas Technology Corp |
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191 / 1003 page  Rev. 5.0, 09/04, page 169 of 978 N N H'00 φ RTCNT RTCOR Refresh request signal and CMF bit setting signal Figure 6.27 Compare Match Timing TRp TR1 TR2 φ CSn(RAS) ( UCAS/LCAS) PB4/PB5 RD(WE) RFSH AS Address bus* Area 2 start address High High level Note: * In address update mode 1, the area 2 start address is output. In address update mode 2, the address in the preceding bus cycle is retained. Figure 6.28 CBR Refresh Timing (CSEL = 0, TPC = 0, RLW = 0) The basic CBS refresh cycle timing comprises three states: one RAS precharge cycle (T RP) state, and two RAS output cycle (T R1, TR2) states. Either one or two states can be selected for the RAS precharge cycle. When the TPC bit is set to 1 in DRCRB, RAS signal output is delayed by one cycle. This does not affect the timing of UCAS and LCAS output. |
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