RX64M_15 Datasheet, PDF (215/230 Pages) Renesas Technology Corp – Renesas MCUs

RX64M Group
5.9 Oscillation Stop Detection Timing
5. Electrical Characteristics
Table 5.51 Oscillation Stop Detection Circuit Characteristics
Conditions: VCC = AVCC0 = AVCC1 = VCC_USB = V_BATT = 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,
T_a = T_opr
Item
Detection time
Symbol
t_dr
Min.
Typ.
Max.
Unit
Test
Conditions
—
—
1
ms Figure 5.83
Main clock or
PLL clock
t_dr
OSTDSR.OSTDF
LOCO clock
ICLK
Figure 5.83 Oscillation Stop Detection Timing
5.10 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,
V_BATT = 2.0 to 3.6 V, T_a = T_opr
Item
Symbol
Min.
Typ.
Max.
Unit
Test
Conditions
Voltage level for switching to battery backup
Lower-limit V_BATT voltage for power supply switching due to
VCC voltage drop
V_DETBATT
V_BATTSW
2.50
2.70
2.60
—
2.70
—
V Figure 5.84
VCC-off period for starting power supply switching
t_VOFFBATT
200
—
—
μs
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 (V_DETBATT).
VCC
V_DETBATT
t_VOFFBATT
V_BATT
V_BATTSW
Figure 5.84
Backup power
area
VCC supply
V_BATT supply
Battery Backup Function Characteristics
R01DS0173EJ0100 Rev.1.00
Jul 31, 2014
VCC supply
Page 215 of 230