tmp1941af TOSHIBA Semiconductor CORPORATION, tmp1941af Datasheet - Page 272

• Manufacturer Part Number: tmp1941af
• Description: 32-bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

16. Watchdog Timer (WDT)
16.1 Implementation
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 TMP1941AF contains a watchdog timer (WDT). The WDT is used to regain control of the system in the
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
Reset
fsys/2
WDMOD.
WDTP[1:0]
22-Stage Binary Counter
Figure 16.1 WDT Block Diagram
2
15
Watchdog Timer Control Register
2
Reset
Write of
4EH
17
Selector
TMP1941AF-232
2
Internal Data Bus
19
2
(WDCR)
21
Write of
B1H
R
WDMOD.RESCR
Reset Control
WDMOD.WDTE
Q
S
Interrupt Request
(INTWDT)
TMP1941AF
Internal Reset
RESET Pin
2003-03-27