s908gr16ag4cfj Freescale Semiconductor, Inc, s908gr16ag4cfj Datasheet - Page 235

• Manufacturer Part Number: s908gr16ag4cfj
• Description: M68hc08 Microcontrollers Microcontroller
• 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 = Break address match
0 = No break address match
Address: $FE0B
Address: $FE09
Address: $FE0A
Reset:
Reset:
Reset:
Read:
Read:
Read:
Write:
Write:
Write:
Figure 19-4. Break Status and Control Register (BRKSCR)
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
Bit 14
Bit 6
6
0
6
0
6
0
MC68HC908GR16A Data Sheet, Rev. 1.0
Bit 13
Bit 5
5
0
0
5
0
5
0
Bit 12
Bit 4
4
0
0
4
0
4
0
Bit 11
Bit 3
3
0
0
3
0
3
0
Bit 10
Bit 2
2
0
0
2
0
2
0
Bit 9
Bit 1
1
0
0
1
0
1
0
Break Module (BRK)
Bit 0
Bit 0
Bit 8
Bit 0
Bit 0
0
0
0
0
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