mc68hc908gt8 Freescale Semiconductor, Inc, mc68hc908gt8 Datasheet - Page 241

• Manufacturer Part Number: mc68hc908gt8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

19.2.2.1 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
19.2.2.2 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.
Freescale Semiconductor
This read/write bit enables breaks on break address register matches. Clear BRKE by writing a 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 1 to BRKA
generates a break interrupt. Clear BRKA by writing a 0 to it before exiting the break routine. Reset
clears the BRKA bit.
1 = Breaks enabled on 16-bit address match
0 = Breaks disabled
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:
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
Figure 19-4. Break Status and Control Register (BRKSCR)
$FE0B
$FE0A
$FE09
BRKE
Bit 15
Bit 7
Bit 7
Bit 7
Bit 7
0
0
0
Figure 19-5. Break Address Register High (BRKH)
Figure 19-6. Break Address Register Low (BRKL)
= 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
Break Module (BRK)
Bit 0
Bit 0
Bit 8
Bit 0
Bit 0
0
0
0
0
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