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AN2104 Datasheet(PDF) 2 Page - Freescale Semiconductor, Inc |
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AN2104 Datasheet(HTML) 2 Page - Freescale Semiconductor, Inc |
2 / 20 page Application Note AN2104 2 When the BDM is active, it takes over control of the microprocessor, which allows for debugging, etc. Other examples of what the BDM can be used for, besides debugging, vary from programming EPROM, EEPROM, and FLASH (internal and external) to performing calibration on a target application (in manufacturing and in the field) to transferring collected and stored information to another system. Theory of Operation Because software packages, such as P&E Microcomputer Systems’ Windows Development Package (PKG12), take care of the operation of the BDM, this discussion does not go into great detail. For more in-depth information on this subject, refer to the documents referenced in Technical Resources at the end of this document. The operation of the BDM system requires a host PC with software, a BDM interface POD or BDM interface, and the user’s target application. See Figure 1. The host PC is connected to the POD with a DB-25 parallel cable from the PC’s parallel port. The POD is then connected to the target application via a custom 6-pin BDM connector and cable. See Figure 2. Figure 1. BDM System HOST PC INTERFACE POD BDM INTERFACE TARGET BOARD PARALLEL CABLE CABLE12 FROM P&E MICROCOMPUTER SYSTEMS BDM CABLE 6-PIN BDM CONNECTOR SEE FIGURE 2 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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