R8C33G_15 Datasheet, PDF (38/57 Pages) Renesas Technology Corp – RENESAS MCU

R8C/33G Group, R8C/33H Group
5. Electrical Characteristics
Table 5.11 Voltage Detection 2 Circuit Electrical Characteristics
Symbol
Parameter
Condition
Standard
Unit
Min. Typ. Max.
Vdet2
Voltage detection level Vdet2
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 − 0.1) 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
Notes:
1. The measurement condition is VCC = 2.7 V to 5.5 V and Topr = −40 to 85°C (J version) / −40 to 125°C (K 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.
Table 5.12 Power-on Reset Circuit ⁽²⁾
Symbol
trth
Parameter
External power VCC rise gradient
Condition
(1)
Standard
Unit
Min. Typ. Max.
0
− 50,000 mV/msec
Notes:
1. The measurement condition is Topr = −40 to 85°C (J version) / −40 to 125°C (K 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.
Vdet0 ⁽¹⁾
External
Power VCC
0.5 V
trth
tw(por) ⁽²⁾
trth
Voltage detection 0
circuit response time
Vdet0 ⁽¹⁾
Internal
reset signal
1 _{× 32}
fOCO-S
1 _{× 32}
fOCO-S
Notes:
1. Vdet0 indicates the voltage detection level of the voltage detection 0 circuit. Refer to 6. Voltage Detection
Circuit 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.
Figure 5.3 Power-on Reset Circuit Electrical Characteristics
R01DS0091EJ0100 Rev.1.00
Jul. 05, 2011
Page 38 of 54