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S9S08QD2CSC Datasheet(PDF) 81 Page - Freescale Semiconductor, Inc

Part # S9S08QD2CSC
Description  HCS08 Microcontrollers
PDF  198 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

S9S08QD2CSC Datasheet(HTML) 81 Page - Freescale Semiconductor, Inc

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Chapter 7 Central Processor Unit (S08CPUV2)
MC9S08QD4 Series MCU Data Sheet, Rev. 6
Freescale Semiconductor
81
7.4.5
BGND Instruction
The BGND instruction is new to the HCS08 compared to the M68HC08. BGND would not be used in
normal user programs because it forces the CPU to stop processing user instructions and enter the active
background mode. The only way to resume execution of the user program is through reset or by a host
debug system issuing a GO, TRACE1, or TAGGO serial command through the background debug
interface.
Software-based breakpoints can be set by replacing an opcode at the desired breakpoint address with the
BGND opcode. When the program reaches this breakpoint address, the CPU is forced to active
background mode rather than continuing the user program.



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