mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 254

• Manufacturer Part Number: mc68hc908mr32
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Development Support
18.2.3.1 Break Status and Control Register
The break status and control register (BRKSCR) contains break module enable and status bits.
BRKE — Break Enable Bit
BRKA — Break Active Bit
18.2.3.2 Break Address Registers
The break address registers (BRKH and BRKL) contain the high and low bytes of the desired breakpoint
address. Reset clears the break address registers.
254
This read/write bit enables breaks on break address register matches. Clear BRKE by writing a logic
0 to bit 7. Reset clears the BRKE bit.
This read/write status and control bit is set when a break address match occurs. Writing a logic 1 to
BRKA generates a break interrupt. Clear BRKA by writing a logic 0 to it before exiting the break routine.
Reset clears the BRKA bit.
1 = Breaks enabled on 16-bit address match
0 = Breaks disabled on 16-bit address match
1 = When read, break address match
0 = When read, no break address match
Address:
Address:
Address:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Write:
Write:
Write:
Figure 18-3. Break Status and Control Register (BRKSCR)
$FE0E
$FE0C
$FE0D
BRKE
Bit 15
Bit 7
Bit 7
Bit 7
Bit 7
0
0
0
Figure 18-4. Break Address Register High (BRKH)
Figure 18-5. Break Address Register Low (BRKL)
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
= Unimplemented
BRKA
14
6
0
6
0
6
6
0
13
5
0
0
5
0
5
5
0
12
4
0
0
4
0
4
4
0
11
3
0
0
3
0
3
3
0
10
2
0
0
2
0
2
2
0
1
0
0
1
9
0
1
1
0
Freescale Semiconductor
Bit 0
Bit 0
Bit 8
Bit 0
Bit 0
0
0
0
0