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H8/3003 Datasheet(PDF) 154 Page - Renesas Technology Corp |
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H8/3003 Datasheet(HTML) 154 Page - Renesas Technology Corp |
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154 / 715 page  Features as an Interval Timer • Refresh timer counter (RTCNT) can be used as an 8-bit up-counter • Selection of seven counter clock sources: ø/2, ø/8, ø/32, ø/128, ø/512, ø/2048, ø/4096 • Interrupts can be generated by compare match between RTCNT and the refresh time constant register (RTCOR) 7.1.2 Block Diagram Figure 7-1 shows a block diagram of the refresh controller. Figure 7-1 Block Diagram of Refresh Controller ø/2, ø/8, ø/32, ø/128, ø/512, ø/2048, ø/4096 Legend RTCNT: RTCOR: RTMCSR: RFSHCR: Refresh signal Clock selector Comparator CMI interrupt Module data bus Refresh timer counter Refresh time constant register Refresh timer control/status register Refresh control register Control logic 136 |
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