MC68HC908GR16 Datasheet, PDF (210/310 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
System Integration Module (SIM)
active or inactive in wait mode. Some modules can be programmed to be active in
wait mode.
Wait mode also can be exited by a reset (or break in emulation mode). 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 logic 0, then the computer operating properly module (COP) is enabled
and remains active in wait mode.
IAB
WAIT ADDR
WAIT ADDR + 1
SAME
SAME
IDB
PREVIOUS DATA
NEXT OPCODE
SAME
SAME
R/W
Note: Previous data can be operand data or the WAIT opcode, depending on the
last instruction.
Figure 15-16. Wait Mode Entry Timing
Figure 15-17 and Figure 15-18 show the timing for WAIT recovery.
IAB
$6E0B
$6E0C $00FF $00FE $00FD $00FC
IDB $A6 $A6
$A6
$01
$0B
$6E
EXITSTOPWAIT
Note: EXITSTOPWAIT = RST pin or CPU interrupt
Figure 15-17. Wait Recovery from Interrupt
IAB
$6E0B
32
CYCLES
32
CYCLES
IDB $A6 $A6
$A6
RSTVCTH RSTVCTL
RST
CGMXCLK
Figure 15-18. Wait Recovery from Internal Reset
Data Sheet
210
System Integration Module (SIM)
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MC68HC908GR16 — Rev. 1.0
MOTOROLA