21.3 Operations
21.3.1 Basic Operation
The Watchdog timer is consists of the binary counters that work using the system clock (fsys) as an input.
Detecting time can be selected between 2
15
, 2
17
, 2
19
, 2
21
, 2
23
and 2
25
by the WDMOD<WDTP[2:0]>. The detect-
ing time as specified is elapsed, the watchdog timer interrupt (INTWDT) generates, and the watchdog timer
out pin (WDTOUT) output "Low".
To detect malfunctions (runaways) of the CPU caused by noise or other disturbances, the binary counter
of the watchdog timer should be cleared by software instruction before INTWDT interrupt generates. If the bi-
nary counter is not cleared, the non-maskable interrupt generates by INTWDT. Thus CPU detects malfunc-
tion (runway), malfunction countermeasure program is performed to return to the normal operation.
Additionally, it is possible to resolve the problem of a malfunction (runaway) of the CPU by connecting
the watchdog timer out pin to reset pins of peripheral devices.
Note:
This product does not include a watchdog timer out pin (WDTOUT).
21.3.2 Operation Mode and Status
The watchdog timer begins operation immediately after a reset is cleared.
If not using the watchdog timer, it should be disabled.
The watchdog timer cannot be used as the high-speed frequency clock is stopped. Before transition to be-
low modes, the watchdog timer should be disabled.In IDLE mode, its operation depends on the WDMOD
<I2WDT> setting.
-
STOP mode
-
SLEEP mode
-
SLOW mode
Also, the binary counter is automatically stopped during debug mode.
TMPM3V6/M3V4
Page 435
2019-02-06
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 ...
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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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