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==Microcontroller application development==
A good development tool environment is important to reduce total development time and cost. Users want to debug their application program under conditions that imitate the actual setup of their system. Because of that, the capability to debug a user program in an actual target system is required. This is known as [[in-circuit emulator|in-circuit debugging]]. Furthermore, most new MCUs have nonvolatile memory such as [[flash memory]] so that programming code on the target system is also required.{{Dubious|date=March 2010}} This is known as [[In-system programming|in-circuit programming]].
To support in-circuit debugging and programming requirements, the HC08 Family has the monitor mode and the HCS08 and RS08 utilize a background debug mode (BDM). The background debug hardware on the HCS08 consists of a background debug controller (BDC) and debug module (DBG). The background debug hardware on the RS08 consists of the background debug controller (BDC) only.
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