MC68HC908JK1 Datasheet, PDF (190/210 Pages) Motorola, Inc – MC68HC908JK1

Break Module (BREAK)
17.5.4 Break Flag Control Register (BFCR)
The break control register contains a bit that enables software to clear
status bits while the MCU is in a break state.
Address: $FE03
Bit 7
6
5
4
3
2
1
Bit 0
Read:
BCFE
R
R
R
R
R
R
R
Write:
Reset: 0
R = Reserved
Figure 17-7. Break Flag Control Register (BFCR)
BCFE — Break Clear Flag Enable Bit
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.
1 = Status bits clearable during break
0 = Status bits not clearable during break
17.6 Low-Power Modes
The WAIT and STOP instructions put the MCU in low-power-
consumption standby modes.
17.6.1 Wait Mode
If enabled, the break module is active in wait mode. In the break routine,
the user can subtract one from the return address on the stack if SBSW
is set (see 7.7 Low-Power Modes). Clear the SBSW bit by writing logic
zero to it.
17.6.2 Stop Mode
A break interrupt causes exit from stop mode and sets the SBSW bit in
the break status register. See 7.8 SIM Registers.
Technical Data
190
Break Module (BREAK)
MC68H(R)C908JL3 — Rev. 1.0
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