SAB80C517-M16 SIEMENS [Siemens Semiconductor Group], SAB80C517-M16 Datasheet - Page 142
SAB80C517-M16
Manufacturer Part Number
SAB80C517-M16
Description
8-Bit CMOS Single-Chip Microcontroller
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.SAB80C517-M16.pdf
(323 pages)
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The reload register WDTREL can be written to at any time, as already mentioned. Therefore, a
periodical refresh of WDTREL can be added to the above mentioned starting procedure of the
watchdog timer. Thus a wrong reload value caused by a possible distortion during the write
operation to the WDTREL can be corrected by software.
Figure 7-58
Block Diagram of the Programmable Watchdog Timer
Figure 7-59
Special Function Register WDTREL
Bit
WDTREL.7
WDTREL.6
to
WDTREL.0
Semiconductor Group
086 H
Function
Prescaler select bit.
When set, the watchdog is clocked through an additional divide-by-16
prescaler (see figure 7-58).
Seven bit reload value for the high-byte of the watchdog timer. This
value is loaded to the WDT when a refresh is triggered by a consecutive
setting of bits WDT and SWDT.
Watchdog timer reload register
143
On-Chip Peripheral Components
WDTREL
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