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R5F564MFDDFB Datasheet(PDF) 212 Page - Renesas Technology Corp

Part # R5F564MFDDFB
Description  120-MHz 32-bit RX MCU, on-chip FPU, 240 DMIPS, up to 4-MB flash memory
PDF  228 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R5F564MFDDFB Datasheet(HTML) 212 Page - Renesas Technology Corp

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R01DS0173EJ0110 Rev.1.10
Page 212 of 228
Oct 24, 2016
RX64M Group
5. Electrical Characteristics
5.10
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 5.84
Battery Backup Function Characteristics
Table 5.52
Battery Backup Function Characteristics
Conditions: VCC = AVCC0 = AVCC1 = VCC_USB = 2.7 to 3.6 V, 2.7
≤ VREFH0 ≤ AVCC0,
VCC_USBA = AVCC_USBA = 3.0 to 3.6 V,
VSS = AVSS0 = AVSS1 = VREFL0 = VSS_USB = VSS1_USBA = VSS2_USBA = PVSS_USBA = AVSS_USBA = 0 V,
VBATT = 2.0 to 3.6 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 5.84
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
VBATT
VCC
VDETBATT
VBATTSW
tVOFFBATT
VBATT
Switching prohibited
VBATT
Switching prohibited
VCC supply
VCC supply
VBATT supply
VCC voltage
guaranteed range
VBATT voltage
guaranteed range
Backup power
area
The VBATT voltage when the supplied power source switches from Vcc to VBATT should not be lower than VBATTSW,
the lower-limit VBATT voltage for switching between power supplies due to a drop in the VCC voltage.
Note.



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