EasyManuals Logo

Infineon Technologies TC1796 User Manual

Infineon Technologies TC1796
2150 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #950 background imageLoading...
Page #950 background image
TC1796
System Units (Vol. 1 of 2)
Watchdog Timer
User’s Manual 16-12 V2.0, 2007-07
WDT, V2.0
16.4.5 Term Definitions for WDT_CON0 Accesses
To simplify the descriptions in the following sections, a number of terms are defined to
indicate the type of access to register WDT_CON0:
Watchdog Access Sequence: Two accesses to register WDT_CON0 consisting of first
a Password Access followed by a Modify Access. The two accesses do not have to be
adjacent accesses, any number of accesses to other addresses can occur between
these accesses as long as the Time-out Period is not exceeded.
Password Access: The first access of a Watchdog Access Sequence to register
WDT_CON0 intended to open WDT_CON0 for modifications. This access needs to write
a defined password value to WDT_CON0 in order to successfully open WDT_CON0.
Valid Password Access: A Password Access with the correct password value. A Valid
Password Access opens register WDT_CON0 for one, and only one, Modify Access. Bit
WDTLCK is set to 0 after this access. The WDT is placed into the Time-Out Mode after
a Valid Password Access in Normal Mode or Disabled Mode.
Modify Access: The second access of an Watchdog Access Sequence to register
WDT_CON0 intended to modify parameters in WDT_CON0. The parameters that can
be modified are WDTREL, WDTPW and ENDINIT. Special guard bits in WDT_CON0
must be written with predefined values in order for this access to be accepted.
Valid Modify Access: A Modify Access with the correct guard bit values. The values
written to WDTREL, WDTPW, and ENDINIT are in effect after completion of this access.
Bit WDTLCK is automatically set to 1 after this access. Register WDT_CON0 is locked
until it is re-opened with a Valid Password Access again.

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Infineon Technologies TC1796 and is the answer not in the manual?

Infineon Technologies TC1796 Specifications

General IconGeneral
BrandInfineon Technologies
ModelTC1796
CategoryController
LanguageEnglish