tmp89fm82 TOSHIBA Semiconductor CORPORATION, tmp89fm82 Datasheet - Page 444

• Manufacturer Part Number: tmp89fm82
• Description: 8 Bit Microcontroller Tlcs-870/c1 Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

25.6
Voltage Detecting Circuit Characteristics
RA000
25.6
Note 1: Because the power-on reset releasing voltage and the power-on reset detecting voltage change relative to one another,
Note 2: A clock output by an oscillating circuit is used as the input clock for a warming-up counter. Because the oscillation fre-
Note 3: Boost the power supply voltage such that t
Note:Care must be taken in system designing since the power-on reset circuit may not fulfill its functions due to the
Voltage Detecting Circuit Characteristics
Voltage detection reset signal
Signal to request the voltage
detection interrupt
Symbol
t
V
Symbol
t
t
V
t
VLTOFF
VLTPW
t
t
fluctuations in the power supply voltage (V
VLTON
PROFF
PROFF
PRON
t
PWUP
t
PRON
PRW
VDD
Level of detected voltage
the detected voltage will never become inverted.
quency does not stabilize until an oscillating circuit stabilizes, some errors may be included in the warming-up time.
Figure 25-7 Operation Timing of the Voltage Detecting Circuit
Operating voltage
Power supply voltage (V
Voltage detection releasing response time
Voltage detecting detection response time
Voltage detecting minimum pulse width
Power-on reset releasing voltage
Power-on reset detecting voltage
Power-on reset releasing response time
Power-on reset detecting response time
Power-on reset minimum pulse width
Warming-up time after a reset is cleared
Power supply rise time
Parameter
Parameter
DD
)
Note
Note
DD
).
VDD
Page 428
t
VLTON
becomes smaller that t
1.85
1.70
Min.
Min.
1.0
1.0
t
−
−
−
−
−
−
VLTPW
102 x 2
PWUP
Typ.
2.02
1.85
0.01
0.01
t
Typ.
0.01
0.01
VLTOFF
−
−
−
9
/fc
.
(V
(V
SS
SS
Max.
2.19
2.00
= 0 V, Topr = −40 to 85°C)
=0 V, Topr = −40 to 85°C)
0.1
0.1
Max.
−
−
5
0.1
0.1
−
TMP89FM82
Unit
ms
ms
Unit
V
s
ms