MC68HC08LT8 Datasheet, PDF (139/156 Pages) Freescale Semiconductor, Inc – Microcontrollers

Break Module (BRK)
15.2.2 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)
15.2.2.1 Break Status and Control Register (BRKSCR)
The break status and control register contains break module enable and status bits.
Address: $FE0E
Bit 7
6
5
4
3
2
1
Bit 0
Read:
0
0
0
0
0
0
BRKE BRKA
Write:
Reset: 0
0
0
0
0
0
0
0
= Unimplemented
Figure 15-2. Break Status and Control Register (BRKSCR)
BRKE — Break Enable Bit
This read/write bit enables breaks on break address register matches. Clear BRKE by writing a logic
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 logic one to
BRKA generates a break interrupt. Clear BRKA by writing a logic zero to it before exiting the break
routine. Reset clears the BRKA bit.
1 = Break address match
0 = No break address match
MC68HC08LT8 Data Sheet, Rev. 1
Freescale Semiconductor
139