Background debug mode interface

Background debug mode (BDM) interface is an electronic interface that allows <a href="/facts/Debugging/QtdpPJT0">debugging</a> of <a href="/facts/Embedded_system/a4muX1wU">embedded systems</a>. Specifically, it provides <a href="/facts/In-circuit_emulator/lcXrRxYd">in-circuit debugging</a> functionality in microcontrollers. It requires a single wire and specialized electronics in the system being debugged. It appears in many <a href="/facts/Freescale_Semiconductor/mRjBBbeX">Freescale Semiconductor</a> products. Background commands are categorized into two types: Non-intrusive commands and Active background commands. Non-intrusive commands can be issued while the user program is running, which include memory access commands.
The interface allows a Host to manage and query a target. Specialized hardware is required in the target device. No special hardware is required in the host; a simple bidirectional <a href="/facts/I%2fO_port/PmLNFq01">I/O pin</a> is sufficient.

Background debug mode interface open-in-new

Background debug mode interface