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R5F21357CDFP Datasheet(PDF) 35 Page - Renesas Technology Corp

Part # R5F21357CDFP
Description  RENESAS MCU
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R5F21357CDFP Datasheet(HTML) 35 Page - Renesas Technology Corp

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R8C/35C Group
5. Electrical Characteristics
R01DS0006EJ0100 Rev 1.00
Page 35 of 54
Aug. 24, 2010
Notes:
1.
The measurement condition is VCC = 1.8 V to 5.5 V and Topr =
−20 to 85°C (N version) / −40 to 85°C (D version).
2.
Time until the voltage monitor 2 interrupt request is generated after the voltage passes Vdet2.
3.
Necessary time until the voltage detection circuit operates after setting to 1 again after setting the VCA27 bit in the VCA2
register to 0.
Notes:
1.
The measurement condition is Topr =
−20 to 85°C (N version) / −40 to 85°C (D version), unless otherwise specified.
2.
To use the power-on reset function, enable voltage monitor 0 reset by setting the LVDAS bit in the OFS register to 0.
Figure 5.3
Power-on Reset Circuit Electrical Characteristics
Table 5.10
Voltage Detection 2 Circuit Electrical Characteristics
Symbol
Parameter
Condition
Standard
Unit
Min.
Typ.
Max.
Vdet2
Voltage detection level Vdet2_0
At the falling of VCC
3.70
4.00
4.30
V
Hysteresis width at the rising of Vcc in voltage detection
2 circuit
0.10
V
Voltage detection 2 circuit response time (2)
At the falling of Vcc from
5 V to (Vdet2_0
− 0.1) V
20
150
µs
Voltage detection circuit self power consumption
VCA27 = 1, VCC = 5.0 V
1.7
−µA
td(E-A)
Waiting time until voltage detection circuit operation
starts (3)
−−
100
µs
Table 5.11
Power-on Reset Circuit (2)
Symbol
Parameter
Condition
Standard
Unit
Min.
Typ.
Max.
trth
External power VCC rise gradient
(1)
0
50,000
mV/msec
Notes:
1. Vdet0 indicates the voltage detection level of the voltage detection 0 circuit. Refer to 6. Voltage Detection
Circuit of User’s Manual: Hardware (REJ09B0567) for details.
2. tw(por) indicates the duration the external power VCC must be held below the valid voltage (0.5 V) to enable
a power-on reset. When turning on the power after it falls with voltage monitor 0 reset disabled, maintain
tw(por) for 1 ms or more.
Vdet0
(1)
0.5 V
Internal
reset signal
tw(por)
(2)
Voltage detection 0
circuit response time
Vdet0
(1)
1
fOCO-S
× 32
1
fOCO-S
× 32
External
Power VCC
trth
trth


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