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AN2104 - Using Background Debug Mode

Description

Enter background mode (if firmware enabled).

Read from memory with BDM in map (may steal cycles if external access) data for odd address on low byte, data for even address on high byte.

FF01, READ_BD_BYTE $FF01.

Features

  • d data 1 = Valid data.

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Full PDF Text Transcription

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www.DataSheet4U.com Freescale Semiconductor Order this document by AN2104/D AN2104 Using Background Debug Mode for the M68HC12 Family Freescale Semiconductor, Inc... By Timothy J. Airaudi Applications Engineering, Microcontroller Division Austin, Texas Introduction This application note describes the basic operation of the background debug mode (BDM) and some of its applications, as it relates to Motorola’s M68HC12 Family of microcontrollers (MCU). Examples of incircuit programming of internal FLASH memory and in-circuit debugging, using P&E Microcomputer Systems’ BDM interface cable and its software, are also contained in this document. The BDM’s main purpose is to allow debugging of the actual microcontroller being used in the user’s target application.
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