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R5F5630ECDFB 数据表(PDF) 153 Page - Renesas Technology Corp |
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R5F5630ECDFB 数据表(HTML) 153 Page - Renesas Technology Corp |
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153 / 165 page  R01DS0060EJ0100 Rev.1.00 Page 153 of 168 Sep 13, 2011 RX630 Group 5. Electrical Characteristics 5.10 Oscillation Stop Detection Timing Figure 5.44 Oscillation Stop Detection Timing 5.11 Battery Backup Function Characteristics Note: • The VCC-off period for starting power supply switching indicates the period in which VCC is below the minimum value of the voltage level for switching to battery backup (VDETBATT). Figure 5.45 Battery Backup Function Characteristics Table 5.27 Oscillation Stop Detection Circuit Characteristics Conditions: VCC = AVCC0 = VCC_USB = VBATT = 2.7 to 3.6 V, VREFH/VREFH0 = 2.7 V to AVCC0 VSS = AVSS0 = VREFL/VREFL0 = VSS_USB = 0 V Ta = Topr Item Symbol Min. Typ. Max. Unit Test Conditions Detection time tdr — — 1 ms Figure 5.44 Table 5.28 Battery Backup Function Characteristics Conditions: VCC = AVCC0 = VCC_USB = 2.7 to 3.6 V, VREFH/VREFH0 = 2.7 V to AVCC0, VBATT = 2.3 to 3.6 V VSS = AVSS0 = VREFL/VREFL0 = VSS_USB = 0 V Ta = Topr Item Symbol Min. Typ. Max. Unit Test Conditions Voltage level for switching to battery backup VDETBATT 2.50 2.60 2.70 V Figure 5.45 Lower-limit VBATT voltage for power supply switching due to VCC voltage drop VBATTSW 2.70 — — VCC-off period for starting power supply switching tVOFFBATT 200 — — μs tdr Main clock or PLL clock OSTDSR.OSTDF LOCO clock ICLK VCC tVOFFBATT VDETBATT VBATTSW VBATT VCC supply VBATT supply VCC supply Backup power area |
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