System Configuration and Protection
MPC561/MPC563 Reference Manual, Rev. 1.2
6-38
Freescale Semiconductor
6.2.2.3.2
Software Service Register (SWSR)
The SWSR is the location to which the SWT servicing sequence is written. To prevent SWT time-out, a
0x556C followed by 0xAA39 should be written to this register. The SWSR can be written at any time but
returns all zeros when read.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
SWTC
HRESET
1111_1111_1111_1111
Addr
0x2F C004
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
BMT
BME
—
SWF SWE SWRI SWP
HRESET
1111_1111
0
000
0
1
1
1
Figure 6-26. System Protection Control Register (SYPCR)
Table 6-15. SYPCR Bit Descriptions
Bits
Name
Description
0:15
SWTC
Software watchdog timer count. This field contains the count value of the software watchdog
timer.
16:23
BMT
Bus monitor timing. This field specifies the time-out period, in eight-system-clock resolution, of
the bus monitor. BMT must be set to non zero even if the bus monitor is not enabled.
24
BME
Bus monitor enable
0 Disable bus monitor
1 Enable bus monitor
25:27
—
Reserved
28
SWF
Software watchdog freeze
0 Software watchdog continues to run while FREEZE is asserted
1 Software watchdog stops while FREEZE is asserted
29
SWE
Software watchdog enable. Software should clear this bit after a system reset to disable the
software watchdog timer.
0 Watchdog is disabled
1 Watchdog is enabled
30
SWRI
Software watchdog reset/interrupt select
0 Software watchdog time-out causes a non-maskable interrupt to the RCPU
1 Software watchdog time-out causes a system reset
31
SWP
Software watchdog prescale
0 Software watchdog timer is not prescaled
1 Software watchdog timer is prescaled by 2048
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...