mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 268
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mc68hc908bd48
Manufacturer Part Number
mc68hc908bd48
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908BD48.pdf
(288 pages)
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Break Module (BRK)
20.6.2 Break Address Registers
20.6.3 SIM Break Status Register
Data Sheet
268
Address:
Address:
BRKA — Break Active Bit
The break address registers (BRKH and BRKL) contain the high and low
bytes of the desired breakpoint address. Reset clears the break address
registers.
The SIM break status register (SBSR) contains a flag to indicate that a
break caused an exit from wait mode. The flag is useful in applications
requiring a return to wait mode after exiting from a break interrupt.
Reset:
Reset:
Read:
Write:
Read:
Write:
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 = (When read) Break address match
0 = (When read) No break address match
$FE0C
$FE0D
Figure 20-3. Break Address Register High (BRKH)
Bit 15
Figure 20-4. Break Address Register Low (BRKL)
Bit 7
Bit 7
Bit 7
0
0
Break Module (BRK)
14
6
0
6
6
0
13
5
0
5
5
0
12
4
0
4
4
0
11
3
0
3
3
0
MC68HC908BD48
Freescale Semiconductor
10
2
0
2
2
0
9
1
0
1
1
0
—
Rev. 2.1
Bit 0
Bit 8
Bit 0
Bit 0
0
0
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