
Break Module Registers
MC68HC908JL3E Family Data Sheet, Rev. 4
Freescale Semiconductor
131
15.4 Break Module Registers
These registers control and monitor operation of the break module:
Break status and control register (BRKSCR)
Break address register high (BRKH)
Break address register low (BRKL)
Break status register (BSR)
Break flag control register (BFCR)
15.4.1 Break Status and Control Register (BRKSCR)
The break status and control register contains break module enable and status bits.
BRKE — Break Enable Bit
This read/write bit enables breaks on break address register matches. Clear BRKE by writing a zero
to bit 7. Reset clears the BRKE bit.
1 = Breaks enabled on 16-bit address match
0 = Breaks disabled
BRKA — Break Active Bit
This read/write status and control bit is set when a break address match occurs. Writing a one to BRKA
generates a break interrupt. Clear BRKA by writing a zero to it before exiting the break routine. Reset
clears the BRKA bit.
1 = Break address match
0 = No break address match
Address:
$FE0E
Bit 7
654321
Bit 0
Read:
BRKE
BRKA
000000
Write:
Reset:
00000000
= Unimplemented
Figure 15-3. Break Status and Control Register (BRKSCR)