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Infineon Technologies TC1796 User Manual

Infineon Technologies TC1796
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TC1796
System Units (Vol. 1 of 2)
Watchdog Timer
User’s Manual 16-15 V2.0, 2007-07
WDT, V2.0
16.4.6.3 Disable Mode Details
Disable Mode is provided for applications that truly do not require the WDT function. It
can only be entered from Time-Out Mode if bit WDT_CON1.WDTDR is set to 1 before
proper termination of Time-Out Mode. The counter stops in this mode, eliminating the
need for a WDT service. However, if an access to register WDT_CON0 is performed, the
WDT will leave Disable Mode. Disable Mode does not stop the detection of access errors
and the entry of Prewarning Mode nor the entry of Time-Out Mode on a Valid Password
Access.
Table 16-6 WDT Disable Mode
State /
Action
Description
Entry Only from Time-Out Mode by writing ENDINIT to 1 with a Valid Modify
Access (a Valid Password Access must have been executed first),
while bit WDTDR = 1.
Actions
on Entry
Bits WDTAE, WDTOE, WDTPR, and WDTTO are cleared. Bit WDTDS
is set to 1.
Timer WDTTIM is stopped (it retains its current value).
Operation
Exit 1. Valid Password Access to register WDTCON.
2. Invalid access to WDT_CON0 (either during the password or the Modify
Access).
Next
Mode
Depending on Exit condition:
1. Time-Out Mode.
2. Prewarning Mode, bit WDTAE is set to 1 (access error).

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Infineon Technologies TC1796 Specifications

General IconGeneral
BrandInfineon Technologies
ModelTC1796
CategoryController
LanguageEnglish