mc68hc908mr8 Freescale Semiconductor, Inc, mc68hc908mr8 Datasheet - Page 336

• Manufacturer Part Number: mc68hc908mr8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Break (BRK)
20.6.3 SIM Break Status Register
Technical Data
336
The SIM break status register (SBSR) contains a flag to indicate that a
break caused an exit from wait mode. The flag is useful in applications
requiring a return to wait mode after exiting from a break interrupt.
Reset:
BW — Break Wait Bit
BW can be read within the break interrupt routine. The user can modify
the return address on the stack by subtracting 1 from it. The example
code shown in
break interrupt routine. Execute this code at the end of the break
interrupt routine.
dress:
Read:
Write:
Ad-
This read/write bit is set when a break interrupt causes an exit from
wait mode. Clear BW by writing a logic 0 to it. Reset clears BW.
Note: Writing a logic 0
1 = Break interrupt during wait mode
0 = No break interrupt during wait mode
$FE00
Bit 7
R
0
0
Figure 20-6. SIM Break Status Register (SBSR)
clears BW.
Figure 20-7
R
6
0
0
Break (BRK)
R
R
5
0
0
works if the H register was stacked in the
= Reserved
R
4
1
1
R
3
0
0
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
R
2
0
0
Note
BW
1
0
Bit 0
R
0
0