MPC5604B/C Microcontroller Reference Manual, Rev. 8
760 Freescale Semiconductor
30.5.2.5 SWT Service Register (SWT_SR)
The SWT Time-Out (SWT_SR) service register is the target for service sequence writes used to reset the
watchdog timer.
30.5.2.6 SWT Counter Output Register (SWT_CO)
The SWT Counter Output (SWT_CO) register is a read only register that shows the value of the internal
down counter when the SWT is disabled.
Table 30-5. SWT_WN Register field descriptions
Field Description
WST Window start value. When window mode is enabled, the service sequence can only be written when
the internal down counter is less than this value.
Offset 0x010 Access: Read/Write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
0 0 0 0 0 000000000000000000000000 0 00
W WSC
Reset
00000000000000000000000000000000
Figure 30-5. SWT Service Register (SWT_SR)
Table 30-6. SWT_SR field descriptions
Field Description
WSC Watchdog Service Code.This field is used to service the watchdog and to clear the soft lock bit
(SWT_CR.SLK). To service the watchdog, the value 0xA602 followed by 0xB480 is written to the
WSC field. To clear the soft lock bit (SWT_CR.SLKSWT_CR.), the value 0xC520 followed by 0xD928
is written to the WSC field.
Offset 0x014 Access: Read Only
012345678910111213141516171819202122232425262728293031
R CNT
W
Reset
00000000000000000000000000000000
Figure 30-6. SWT Counter Output Register (SWT_CO)
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