参数资料
型号: MC68HC08QT2VDW
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO8
封装: EIAJ, SOIC-8
文件页数: 42/178页
文件大小: 2311K
代理商: MC68HC08QT2VDW
Development Support
MC68HC08QY/QT Family Data Sheet, Rev. 1
136
Freescale Semiconductor
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
The break status and control register (BRKSCR) contains break module enable and status bits.
BRKE — Break Enable Bit
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.
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 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 = Break address match
0 = No break address match
15.2.2.2 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.
Bit 7
654321
Bit 0
Read:
BRKE
BRKA
000000
Write:
Reset:
00000000
= Unimplemented
Figure 15-3. Break Status and Control Register (BRKSCR)
Bit 7
654321
Bit 0
Read:
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Write:
Reset:
00000000
Figure 15-4. Break Address Register High (BRKH)
Bit 7
654321
Bit 0
Read:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
00000000
Figure 15-5. Break Address Register Low (BRKL)
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