Datasheet

R01DS0032EJ0200 Rev.2.00 Page 48 of 88
Feb 07, 2011
M16C/64A Group 5. Electrical Characteristics
Notes:
1. Necessary time until the voltage detector operates after setting to 1 again after setting the VC27 bit in the VCR2
register to 0.
2. Time from when passing the V
det2
until when a voltage monitor 2 reset is generated.
Note:
1. To use the power-on reset function, enable voltage monitor 0 reset by setting the LVDAS bit in the OFS1 address
to 0. Also, set the VDSEL1 bit to 0 (Vdet0_2).
Figure 5.3 Power-On Reset Circuit Electrical Characteristics
Table 5.13 Voltage Detector 2 Electrical Characteristics
The measurement condition is V
CC1
= 2.7 to 5.5 V, T
opr
= -20°C to 85°C/-40°C to 85°C, unless otherwise specified.
Symbol Parameter Condition
Standard
Unit
Min. Typ. Max.
V
det2
Voltage detection level Vdet2_0
When V
CC1
is falling
3.50 4.00 4.50 V
- Hysteresis width at the rising of V
CC1
in voltage
detector 2
0.15 V
-
Voltage detector 2 response time
(2)
When V
CC1
falls from 5
V to (Vdet2_0 - 0.1) V
200
μs
- Voltage detector self power consumption VC27
= 1, V
CC1
= 5.0 V
1.8
μA
t
d(E-A)
Waiting time until voltage detector operation starts
(1)
100 μs
Table 5.14 Power-On Reset Circuit
The measurement condition is V
CC1
= 2.0 to 5.5 V, T
opr
= -20°C to 85°C/ -40°C to 85°C, unless otherwise specified.
Symbol Parameter Condition
Standard
Unit
Min. Typ. Max.
V
por1
Voltage at which power-on reset enabled
(1)
0.1 V
t
rth
External power V
CC1
rise gradient
2.0 50000 mV/ms
t
w(por)
Time necessary to enable power-on reset
300 ms
Vpor1
Internal
reset signal
Voltage detection 0
circuit response time
1
f
OCO-S
× 32
V
CC1
V
(1)
det0
t
rth
t
w(por)
t
rth
V
(1)
det0
1
f
OCO-S
× 32
Note:
1. V
det0
indicates the voltage detection level of the voltage detection 0 circuit.