tmp1940cyaf TOSHIBA Semiconductor CORPORATION, tmp1940cyaf Datasheet - Page 280

• Manufacturer Part Number: tmp1940cyaf
• Description: 32-bit Tx System Risc Tx19 Family
• Manufacturer: TOSHIBA Semiconductor CORPORATION

16. Watchdog Timer (WDT)
16.1 Implementation
the event of software or system lockups due to spurious noises, etc. When a watchdog timer time-out occurs, the
WDT generates a nonmaskable interrupt to the CPU.
the time-out signal to the internal reset pin.
The TMP1940CYAF contains a watchdog timer (WDT). The WDT is used to regain control of the system in
Also, the time-out event can be programmed for system reset generation, which is accomplished by routing
Figure 16.1 shows a block diagram of the WDT.
Internal
fsys/2
Reset
WDMOD.
WDTP[1:0]
22-Stage Binary Counter
Figure 16.1 WDT Block Diagram
2
15
Watchdog Timer Control Register
Reset
2
TMP1940CYAF-238
Write of
4EH
17
Selector
2
Internal Data Bus
19
2
(WDCR)
21
Write of
B1H
R
WDMOD.RESCR
Reset Control
WDMOD.WDTE
Q
S
TMP1940CYAF
Interrupt Request
(INTWDT)
Internal Reset
RESET Pin