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R8C2K 数据表(PDF) 89 Page - Renesas Technology Corp |
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R8C2K 数据表(HTML) 89 Page - Renesas Technology Corp |
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89 / 471 page  R8C/2K Group, R8C/2L Group 10. Clock Generation Circuit Rev.1.10 Dec 21, 2007 Page 72 of 450 REJ09B0406-0110 Figure 10.1 Clock Generation Circuit Oscillation stop detection Divider S Q R 1/2 1/2 1/2 1/2 1/2 Pulse generation circuit for clock edge detection and charge, discharge control circuit Charge, discharge circuit Oscillation stop detection interrupt generation circuit detection S Q R FRA00 High-speed on-chip oscillator FRA01 = 1 FRA01 = 0 CM14 CPU clock a b c d e OCD2 = 0 OCD2 = 1 XIN clock XOUT CM13 CM05 XIN CM02 WAIT instruction RESET CM10 = 1 (stop mode) a d c h b CM06 = 0 CM17 to CM16 = 11b CM06 = 1 CM06 = 0 CM17 to CM16 = 10b CM06 = 0 CM17 to CM16 = 01b CM06 = 0 CM17 to CM16 = 00b Detail of divider Oscillation Stop Detection Circuit XIN clock Forcible discharge when OCD0 = 0 Watchdog timer interrupt OCD1 OCD2 bit switch signal CM14 bit switch signal Oscillation stop detection, Watchdog timer, Voltage monitor 1 interrupt, Voltage monitor 2 interrupt CM02, CM04, CM05, CM06: Bits in CM0 register CM10, CM13, CM14, CM16, CM17: Bits in CM1 register OCD0, OCD1, OCD2: Bits in OCD register FRA00, FRA01: Bits in FRA0 register e g FRA2 register fOCO fOCO-S g f1 f2 f4 f8 f32 h Voltage monitor 2 interrupt System clock Low-speed on-chip oscillator FRA1 register Frequency adjustable CM13 Divider fOCO40M On-chip oscillator clock fOCO-F Power-on reset circuit Voltage detection circuit Voltage monitor 1 interrupt Divider (1/128) fOCO128 Power-on reset Software reset Interrupt request fOCO fOCO-F fOCO-S Peripheral function clock |
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