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SYSTEM CONTROL MODULE
Software Watchdog Timer
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Register bit
assignment
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Software Watchdog Timer
Address: A090 0178
The Software Watchdog Timer register services the watchdog timer.
Bits Access Mnemonic Reset Description
D31:09 NA Reserved N/A N/A
D08 R/W Debug 0x0 Debug mode
0 Timer enabled in CPU debug mode
1 Timer disabled in CPU debug mode
D07 R/W SWWE 0x0 Software watchdog enable
0 Software watchdog disabled
1 Software watchdog enabled; once set, cannot be
cleared
D06 N/A Reserved N/A N/A
D05 R/W SWWI 0x0 Software watchdog interrupt clear
Write a 1, then a 0 to this register to clear the
software watchdog interrupt.
D04 R/W SWWIC 0x0 Software watchdog interrupt response
0 Generate interrupt
1 Generate reset
Note: If the interrupt option is selected and a
software watchdog timeout occurs and the
interrupt has not been cleared from a pre-
vious timeout, the reset is asserted.
D03 N/A Reserved N/A N/A
D02:00 R/W SWTCS 0x0 Software watchdog timer clock select
000 System memory clock / 2
001 System memory clock / 4
010 System memory clock / 8
011 System memory clock / 16
100 System memory clock / 32
101 System memory clock / 64
110 Reserved
111 Reserved