System Configuration and Protection
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
6-23
Figure 6-10. SWT Block Diagram
6.1.11
Freeze Operation
When the FREEZE line is asserted, the clocks to the software watchdog, the periodic interrupt timer, the
real-time clock, the time base counter, and the decrementer can be disabled. This is controlled by the
associated bits in the control register of each timer. If programmed to stop during FREEZE assertion, the
counters maintain their values while FREEZE is asserted. The bus monitor remains enabled regardless of
this signal.
6.1.12
Low Power Stop Operation
When the processor is set in a low-power mode (doze, sleep, or deep-sleep), the software watchdog timer
is frozen. It remains frozen and maintains its count value until the processor exits this state and resumes
executing instructions.
The periodic interrupt timer, decrementer, and time base are not affected by these low-power modes. They
continue to run at their respective frequencies. These timers are capable of generating an interrupt to bring
the MCU out of these low-power modes.
6.2
Memory Map and Register Definitions
This section provides the MPC561/MPC563 memory map, register diagrams and bit descriptions of the
system configuration and protection registers.
6.2.1
Memory Map
The MPC561/MPC563 internal memory space can be assigned to one of eight locations.
Disable
Clock
FREEZE
SWR/Decrementer
Time-out
16-bit
SWTC
SWE
Service
Logic
Reload
Rollover = 0
Reset
SWSR
MUX
2048
System
SWP
Clock
Divide By
or NMI
(SYPCR)
(SYPCR)
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...