S128 Datasheet, PDF (48/107 Pages) Renesas Technology Corp – Microcontroller

S128
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
Parameter
Power-on VCC
rising gradient
Voltage monitor 0 reset disabled at startup
Voltage monitor 0 reset enabled at startup*^1, *²
SCI boot mode*²
Symbol Min
SrVCC 0.02
Typ Max Unit Test conditions
-
2
ms/V -
-
2
Note 1. When OFS1.LVDAS = 0.
Note 2. At boot mode, the reset from voltage monitor 0 is disabled regardless of the value of OFS1.LVDAS bit.
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.
Parameter
Symbol Min
Typ
Max Unit Test conditions
Allowable ripple frequency
f_{r (VCC)}
-
-
10
kHz
Figure 2.24
V_{r (VCC)} ≤ VCC × 0.2
-
-
1
MHz
Figure 2.24
V_{r (VCC)} ≤ VCC × 0.08
-
-
10
MHz
Figure 2.24
V_{r (VCC)} ≤ VCC × 0.06
Allowable voltage change rising and dt/dVCC 1.0
-
-
falling gradient
ms/V ^{When VCC change exceeds VCC ±10%}
VCC
Figure 2.24 Ripple waveform
1/f_r(VCC)
V_r(VCC)
R01DS0309EU0100 Rev.1.00
Mar 10, 2017
Page 48 of 107