mc68hc908qf4 Freescale Semiconductor, Inc, mc68hc908qf4 Datasheet - Page 161

• Manufacturer Part Number: mc68hc908qf4
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

16.2.2.4 Break Status Register
16.2.2.5 Break Flag Control Register
MC68HC908QF4 — Rev. 1.0
MOTOROLA
The break status register (BSR) contains a flag to indicate that a break caused an
exit from wait mode. This register is only used in emulation mode.
SBSW — SIM Break Stop/Wait
The break control register (BFCR) contains a bit that enables software to clear
status bits while the MCU is in a break state.
BCFE — Break Clear Flag Enable Bit
Address: $FE00
SBSW can be read within the break state SWI routine. The user can modify the
return address on the stack by subtracting one from it.
This read/write bit enables software to clear status bits by accessing status
registers while the MCU is in a break state. To clear status bits during the break
state, the BCFE bit must be set.
Address: $FE03
Reset:
Read:
Write:
Reset:
Read:
Write:
1 = Wait mode was exited by break interrupt
0 = Wait mode was not exited by break interrupt
1 = Status bits clearable during break
0 = Status bits not clearable during break
Freescale Semiconductor, Inc.
For More Information On This Product,
Bit 7
BCFE
Bit 7
R
R
R
0
Figure 16-9. Break Flag Control Register (BFCR)
Go to: www.freescale.com
Figure 16-8. Break Status Register (BSR)
= Reserved
= Reserved
Development Support
R
6
R
6
R
5
R
5
R
4
R
4
1. Writing a 0 clears SBSW.
R
3
R
3
R
2
R
2
Development Support
Break Module (BRK)
Note
SBSW
1
0
R
1
(1)
Data Sheet
Bit 0
Bit 0
R
R
161