S124 Datasheet, PDF (38/98 Pages) Renesas Technology Corp – 32-bit ARM Cortex-M0+ microcontroller

S124
2.2.10
VCC Rise and Fall Gradient and Ripple Frequency
2. Electrical Characteristics
Table 2.14 Rise and fall gradient characteristics
Conditions: VCC = AVCC0 = 0 to 5.5 V
Item
Power-on VCC
rising gradient
Voltage monitor 0 reset disabled at startup
Voltage monitor 0 reset enabled at startup*^1, *²
Symbol Min
SrVCC 0.02
0.02
Typ Max Unit Test conditions
-
2
ms/V -
-
-
Note 1. When OFS1.LVDAS = 0.
Note 2. Turn the power supply voltage on according to the normal startup rising gradient because the register settings set
by OFS1 are not read in boot mode.
Table 2.15 Rising and falling gradient and ripple frequency characteristics
Conditions: VCC = AVCC0 = 1.6 to 5.5 V
The ripple voltage must meet the allowable ripple frequency f_r(VCC) within the range between the VCC upper limit (5.5 V) and lower limit
(1.6 V).
When the VCC change exceeds VCC ±10%, the allowable voltage change rising and falling gradient dt/dVCC must be met.
Item
Symbol Min
Typ
Max Unit Test conditions
Allowable ripple frequency
f_{r (VCC)}
-
-
-
-
-
-
Allowable voltage change rising and dt/dVCC 1.0
-
falling gradient
10
kHz
Figure 2.17
V_{r (VCC)} ≤ VCC × 0.2
1
MHz
Figure 2.17
V_{r (VCC)} ≤ VCC × 0.08
10
MHz
Figure 2.17
V_{r (VCC)} ≤ VCC × 0.06
-
ms/V ^{When VCC change exceeds VCC ±10%}
VCC
Figure 2.17 Ripple waveform
1/f_r(VCC)
V_r(VCC)
R01DS0264EU0100 Rev.1.00
Feb 23, 2016
Page 38 of 95