mc68hc908rf2 Freescale Semiconductor, Inc, mc68hc908rf2 Datasheet - Page 124

• Manufacturer Part Number: mc68hc908rf2
• Description: M68hc08 Microcontrollers Microcontroller / Transmitter
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
10.6.1 Wait Mode
Data Sheet
124
In wait mode, the CPU clocks are inactive while one set of peripheral clocks
continues to run.
A module that is active during wait mode can wake up the CPU with an interrupt if
the interrupt is enabled. Stacking for the interrupt begins one cycle after the WAIT
instruction during which the interrupt occurred. Refer to the wait mode subsection
of each module to see if the module is active or inactive in wait mode. Some
modules can be programmed to be active in wait mode.
Wait mode can also be exited by a reset or break. A break interrupt during wait
mode sets the SIM break stop/wait bit, SBSW, in the SIM break status register
(SBSR). If the COP disable bit, COPD, in the mask option register is 0, then the
computer operating properly module (COP) is enabled and remains active in wait
mode.
Figure 10-13
EXITSTOPWAIT
Note: EXITSTOPWAIT = RST pin or CPU interrupt or break interrupt
R/W
IDB
IDB
IAB
Note: Previous data can be operand data or the WAIT opcode, depending on the last instruction.
IAB
Freescale Semiconductor, Inc.
For More Information On This Product,
$A6
WAIT ADDR
Figure 10-13. Wait Recovery from Interrupt or Break
and
System Integration Module (SIM)
$6E0B
$A6
Go to: www.freescale.com
Figure 10-12
Figure 10-14
PREVIOUS DATA
Figure 10-12. Wait Mode Entry Timing
$A6
WAIT ADDR + 1
$6E0C
shows the timing for wait mode entry.
show the timing for WAIT recovery.
$01
NEXT OPCODE
$00FF
$0B
SAME
$00FE
$6E
SAME
$00FD
MC68HC908RF2 — Rev. 4.0
SAME
$00FC
SAME
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