RX230 Datasheet, PDF (98/177 Pages) Renesas Technology Corp – 54-MHz 32-bit RX MCUs, built-in FPU, 88.56 DMIPS, up to 512-KB flash memory

RX230 Group, RX231 Group
5. Electrical Characteristics
Table 5.13 DC Characteristics (11)
Conditions: 0 V ≤ VCC = VCC_USB = AVCC0 ≤ 5.5 V, VSS = AVSS0 = VSS_USB = 0 V, T_a = –40 to +105°C
Item
Symbol Min.
Typ.
Max.
Unit
Test Conditions
Power-on VCC rising At normal startup*¹
gradient
During fast startup time*²
SrVCC 0.02
—
0.02
—
20
ms/V
2
Voltage monitoring 0 reset
enabled at startup*^3, *⁴
0.02
—
—
Note 1. When OFS1.(FASTSTUP, LVDAS) bits are 11b.
Note 2. When OFS1.(FASTSTUP, LVDAS) bits are 01b.
Note 3. When OFS1.LVDAS bit is 0.
Note 4. Turn on the power supply voltage according to the normal startup rising gradient because the settings in the OFS1 register are
not read in boot mode.
Table 5.14 DC Characteristics (12)
Conditions: 1.8 V ≤ VCC = VCC_USB = AVCC0 ≤ 5.5 V, VSS = AVSS0 = VSS_USB = 0 V, T_a = –40 to +105°C
The ripple voltage must meet the allowable ripple frequency f_{r (VCC)} within the range between the VCC upper limit and lower limit.
When VCC change exceeds VCC ±10%, the allowable voltage change rising/falling gradient dt/dVCC must be met.
Item
Symbol
Min.
Typ.
Max.
Unit
Test Conditions
Allowable ripple frequency f_{r (VCC)}
—
—
10
kHz Figure 5.7
V_{r (VCC)} ≤ VCC × 0.2
—
—
1
MHz Figure 5.7
V_{r (VCC)} ≤ VCC × 0.08
—
—
10
MHz Figure 5.7
V_{r (VCC)} ≤ VCC × 0.06
Allowable voltage change dt/dVCC
1.0
—
rising/falling gradient
—
ms/V When VCC change exceeds VCC ±10%
VCC
1 / f_{r (VCC)}
V_{r (VCC)}
Figure 5.7
Ripple Waveform
Table 5.15 DC Characteristics (13)
Conditions: 1.8 V ≤ VCC = VCC_USB = AVCC0 ≤ 5.5 V, VSS = AVSS0 = VSS_USB = 0 V, T_a = –40 to +105°C
Item
Symbol
Min.
Typ.
Max.
Unit
Test Conditions
Permissible error of VCL pin external
C_VCL
1.4
4.7
7.0
μF
capacitance
Note: The recommended capacitance is 4.7 μF. Variations in connected capacitors should be within the above range.
R01DS0261EJ0110 Rev.1.10
Oct 30, 2015
Page 98 of 177