21. Watchdog Timer(WDT)
The watchdog timer (WDT) is for detecting malfunctions (runaways) of the CPU caused by noises or other distur-
bances and remedying them to return the CPU to normal operation.
If the watchdog timer detects a runaway, it generates a INTWDT interrupt or reset.
Note:
INTWDT interrupt is a factor of the non-maskable interrupts (NMI).
Also, the watchdog timer notifies of the detecting malfunction to the external peripheral devices from the watch-
dog timer pin (WDTOUT) by outputting "Low".
Note:
This product does not have the watchdog timer out pin (WDTOUT).
21.1 Configuration
Figure 21-1shows the block diagram of the watchdog timer.
WDMOD<RESCR>
To internal reset
RESET pin
Watchdog timer out
control
WDTOUT
Q
R
S
Selector
Binary counter
2
15
/fsys
2
17
/fsys
2
19
/fsys
2
21
/fsys
2
23
/fsys
2
25
/fsys
WDMOD
fsys
WDMOD<WDTE>
Watchdog timer
Control Register WDCR
Reset
Write
“0xB1”
Write
“0x4E”
Internal data bus
Internal reset
Watchdog timer
interrupt
INTWDT
Figure 21-1 Block Diagram of the Watchdog Timer
TMPM3V6/M3V4
Page 431
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 ...
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