SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 250

• Manufacturer Part Number: SAF-C164SM
• Description: 16-Bit CMOS Microcontroller
• Manufacturer: Infineon Technologies

C164CM/C164SM
Derivatives
Watchdog Timer (WDT)
The 16-bit watchdog timer is implemented as two concatenated 8-bit timers (see
Figure
13-2). The upper 8 bits of the watchdog timer can be preset to a
user-programmable value via a watchdog service access in order to vary the watchdog
expire time. The lower 8 bits are reset after each service access.
WDTPRE
WDTIN
÷ 2
f
MUX
MUX
CPU
÷ 2
÷ 128
WDT Low Byte
WDT High Byte
WDTR
Clear
RSTOUT
Reset
WDT
Control
WDTREL
MCB04470
Figure 13-2 Watchdog Timer Block Diagram
User’s Manual
13-2
V1.0, 2002-02