Texas Instruments AM335 Series Technical Reference Manual

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20.4.3.14.2.2 Subsequence – Disable the Watchdog Timer
Table 20-109 lists the steps to disable the watchdog timer.
Table 20-109. Disable the Watchdog Timer
Step Register/Bit Field/Programming Model Value
Write disable sequence Data1. WDT_WSPR XXXX AAAAh
Write disable sequence Data2. WDT_WSPR XXXX 5555h
20.4.3.14.2.3 Subsequence – Enable the Watchdog Timer
Table 20-110 lists the steps to enable the watchdog timer.
Table 20-110. Enable the Watchdog Timer
Step Register/Bit Field/Programming Model Value
Write enable sequence Data1. WDT_WSPR XXXX BBBBh
Write enable sequence Data2. WDT_WSPR XXXX 4444h
20.4.4 Watchdog Registers
CAUTION
The watchdog timers registers are limited to 32-bit and 16-bit data accesses; 8-
bit access is not allowed and can corrupt register content.
NOTE:
• The WDT_WISR and WDT_WIRQSTATRAW registers have the same functionality. The
WDT_WISR register is used for software backward compatibility.
• The WDT_WIER and WDT_WIRQENSET/WDT_WIRQENCLR registers have the same
functionality. The WDT_WIER register is used for software backward compatibility.
• The WDT_WIRQSTATRAW and WDT_WIRQSTAT registers give the same information
when read. The WDT_WIRQSTATRAW register is used for debug.
20.4.4.1 WATCHDOG_TIMER Registers
Table 20-111 lists the memory-mapped registers for the WATCHDOG_TIMER. All register offset
addresses not listed in Table 20-111 should be considered as reserved locations and the register contents
should not be modified.
Table 20-111. WATCHDOG_TIMER REGISTERS
Offset Acronym Register Name Section
0h WDT_WIDR Watchdog Identification Register Section 20.4.4.1.1
10h WDT_WDSC Watchdog System Control Register Section 20.4.4.1.2
14h WDT_WDST Watchdog Status Register Section 20.4.4.1.3
18h WDT_WISR Watchdog Interrupt Status Register Section 20.4.4.1.4
1Ch WDT_WIER Watchdog Interrupt Enable Register Section 20.4.4.1.5
24h WDT_WCLR Watchdog Control Register Section 20.4.4.1.6
28h WDT_WCRR Watchdog Counter Register Section 20.4.4.1.7
2Ch WDT_WLDR Watchdog Load Register Section 20.4.4.1.8
3680
Timers SPRUH73H–October 2011–Revised April 2013
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Texas Instruments AM335 Series Specifications

General

Brand	Texas Instruments
Model	AM335 Series
Category	Computer Hardware
Language	English