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RA4M1 датащи(PDF) 54 Page - Renesas Technology Corp

номер детали RA4M1
подробное описание детали  High efficiency 48-MHz Arm Cortex-M4 core, 256-KB code flash memory
PDF  130 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

RA4M1 датащи(HTML) 54 Page - Renesas Technology Corp

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R01DS0355EJ0100 Rev.1.00
Page 54 of 130
Oct 8, 2019
RA4M1 Group
2. Electrical Characteristics
2.2.10
VCC Rise and Fall Gradient and Ripple Frequency
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.
Figure 2.24
Ripple waveform
Table 2.15
Rise and fall gradient characteristics
Conditions: VCC = AVCC0 = 0 to 5.5 V
Parameter
Symbol Min
Typ
Max
Unit
Test conditions
Power-on VCC
rising gradient
Voltage monitor 0 reset disabled at startup (normal
startup)
SrVCC
0.02
-
2
ms/V
-
Voltage monitor 0 reset enabled at startup*1
0.02
-
-
SCI/USB boot mode*2
0.02
-
2
Table 2.16
Rising and falling gradient and ripple frequency characteristics
Conditions: VCC = AVCC0 = VCC_USB = 1.6 to 5.5 V
The ripple voltage must meet the allowable ripple frequency fr(VCC) within the range between the VCC upper limit (5.5 V) and lower limit
(1.6 V).
When VCC change exceeds VCC ±10%, the allowable voltage change rising/falling gradient dt/dVCC must be met.
Parameter
Symbol
Min
Typ
Max
Unit
Test conditions
Allowable ripple frequency
fr (VCC)
--10
kHz
Figure 2.24
Vr (VCC) ≤ VCC × 0.2
--1
MHz
Figure 2.24
Vr (VCC) ≤ VCC × 0.08
--10
MHz
Figure 2.24
Vr (VCC) ≤ VCC × 0.06
Allowable voltage change rising and
falling gradient
dt/dVCC
1.0
-
-
ms/V
When VCC change exceeds VCC ±10%
Vr(VCC)
VCC
1/fr(VCC)



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