18.2 Function
Figure 18-2 Power-on-reset operation timing
Note:
Since the power-on releasing voltage
and the power-on reset detection voltage relatively change,the detec-
tion voltage is never reversed.
Note:
Due to the fluctuation of supply voltage, the power-on reset circuit may not operate properly. Users should
give due consideration based on the electrical characteristic in the device designing.
TMPM3V6/M3V4
18. Power-on-Reset Circuit (POR)
18.2 Function
Page 416
2019-02-06
At power-on, a power-on detection signal generates while power supply voltage is lower than the releasing volt-
age. Power-on detection signal is released at the timing when RVDD5 is over 3.0 ±0.2 V.
When the power-on detection signal is released and the VLTD
reset
signal is also released, the power-on counter
starts to operate. After waiting time (approximately 0.9 ms) has elapsed, the
internal
reset signal is released.
During the
internal
reset signal generation, the CPU and the peripheral functions are reset.
When a reset input pin is not used, supply voltage must be raised to the VLTD detect voltage until the internal
reset releasing. If power supply voltage does not reach to the VLTD detect voltage during this period,
TMPM3
V6
/3
V4
cannot operate properly.
Since it operate continuously with the voltage detection circuit (VLTD), please refer to the voltage detection
circuit (VLTD) section.
Reset detect signal
㸦
”Low” active)
Internal 1.5V power supp
l
y voltage
Power-on-
reset release voltage
(VPORH)
Power supp
l
y voltage
Op
e
ration voltage range
Internal
reset signal
㸦
”Low” active)
Power-on counter
Power-on detect signal
㸦
”Low” active)
9
9/7'
detect voltage
4.1V±0.2V
㹲325'7
tDVDD
Symbol
Parameter
Min
Typ
Max
Unit
tDVDD
Rising time of power line
0.
1
-
500
ms
VPORH
Power-on Reset releasing voltage
2.8
3
3.2
V
VPORL
Power-on Reset detection voltage
2.6
2.8
3.0
V
tPORDT1
Power-on Reset release
r
esponse time
30
μ
s
Содержание TMPM3V4
Страница 1: ...32 Bit RISC Microcontroller TX03 Series TMPM3V6 M3V4 ...
Страница 2: ... 2019 Toshiba Electronic Devices Storage Corporation ...
Страница 7: ...Revision History Date Revision Comment 2019 02 06 1 First Release ...
Страница 8: ......
Страница 22: ...xiv ...
Страница 52: ...TMPM3V6 M3V4 3 Processor Core 3 6 Exclusive access Page 30 2019 02 06 ...
Страница 148: ...TMPM3V6 M3V4 7 Exceptions 7 6 Exception Interrupt Related Registers Page 126 2019 02 06 ...
Страница 178: ...TMPM3V6 M3V4 9 Input Output port 9 2 Block Diagrams of Ports Page 156 2019 02 06 ...
Страница 206: ...TMPM3V6 M3V4 10 16 bit Timer Event Counters TMRB 10 7 Applications using the Capture Function Page 184 2019 02 06 ...
Страница 232: ...TMPM3V6 M3V4 11 Universal Asynchronous Receiver Transmitter Circuit UART 11 4 Operation Description Page 210 2019 02 06 ...
Страница 354: ...TMPM3V6 M3V4 14 Synchronous Serial Port SSP 14 6 Frame Format Page 332 2019 02 06 ...
Страница 419: ...TMPM3V6 M3V4 Page 397 2019 02 06 ...
Страница 420: ...TMPM3V6 M3V4 16 Analog Digital Converter ADC 16 6 Timing chart of AD conversion Page 398 2019 02 06 ...
Страница 462: ...TMPM3V6 M3V4 21 Watchdog Timer WDT 21 5 Control register Page 440 2019 02 06 ...
Страница 510: ...TMPM3V6 M3V4 22 Flash Memory Operation 22 4 Programming in the User Boot Mode Page 488 2019 02 06 ...
Страница 538: ...TMPM3V6 M3V4 25 Electrical Characteristics 25 7 Recommended Oscillation Circuit Page 516 2019 02 06 ...
Страница 541: ...26 3 TMPM3V4FWUG TMPM3V4FSUG Type LQFP64 P 1010 0 50E LPHQVLRQV TMPM3V6 M3V4 Page 519 2019 02 06 ...
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