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RX72N Datasheet(PDF) 165 Page - Renesas Technology Corp

Part # RX72N
Description  Renesas MCUs
PDF  179 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

RX72N Datasheet(HTML) 165 Page - Renesas Technology Corp

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R01DS0343EJ0120 Rev.1.20
Page 165 of 179
Nov 15, 2023
RX72N Group
2. Electrical Characteristics
2.11
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 2.107
Battery Backup Function Characteristics
Table 2.60
Battery Backup Function Characteristics
Conditions: VCC = AVCC0 = AVCC1 = VCC_USB = 2.7 to 3.6 V, 2.7 V ≤ VREFH0 ≤ AVCC0,
VSS = AVSS0 = AVSS1 = VREFL0 = VSS_USB = 0 V,
VBATT = 1.62 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 2.107
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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