Features

The tool features a prototype area that enables custom interfacing with the MCU's I/O and bus lines. These connections are broken out via on-board headers, which are immediately adjacent to the MCU.

The M68EVB912B32 includes these additional features:

• +3 to +5-volt DC operation
• RS-232C interface
• 32 kilobytes MCU internal FLASH EEPROM with resident DBug12 monitor/debugger program four operational modes:
  • EVB
  • JUMP-EEPROM
  • POD-BDM
  • BOOTLOAD
  • NOTE: If the M68HC912B32's bsckground debug mode (BDM) interface serves as the user interface, the SCI port becomes available for user applications. This mode requires a background debug development tool, such as Freescale's SDI interface, and a host computer with the appropriate software or another B32EVB.
• header connectors for access to the MCU's I/O and bus lines
• on-board prototype area for customized interfacing with the MCU
• low-voltage inhibit protection
• full support for either dumb terminal or host computer terminal interface
• file transfer capability from a host computer, allowing off-board code generation
• Two methods for generating EVB user code:
  • For small programs or subroutines, DBug12 can be used to place object code directly into memory.
  • For larger programs, the IASM12 assembler can be used on a host computer to generate S-Record object files. DBug12 can then be used to load the S-Record files into the EVB's memory.

Hardware and Software Components
The M68EVB912B32 evaluation board comprises three main components:

• Hardware - The board is a multilayered printed circuit board that provides interface and power connections to th dimensions are 5.15 x 3.4 inches (13.08 x 8.63 centimeters).
• Firmware - DBug12, the EVB's firmware-resident monitor program, lets programmers write, evaluate, and debug user programs. DBug12 requires no configuration &emdash; it comes from the factory ready to use with an RS-232C terminal. DBug12 allows programming of the MC68HC912B32's on-chip FLASH EEPROM through commands that directly alter memory.
• NOTE: DBug12 does not use the BDM interface.
• Software - The IASM12 assembly language toolset provides an integrated development environment, including:
  • project manager (MCUproject)
  • relocatable macro-assembler (MASM)
  • linker (MLINK)
  • librarian (AR)
  • Freescale S-Record generator (HEX)

M68EVB912B32 System Requirements
The M68EVB912B32 evaluation board requires:

• RS-232C compatible terminal or a 386-based or higher host PC capable of running an
• RS-232C compatible dumb terminal emulator.
• a serial communication port
• RS-232C compatible, 6-pin BDM target cable
• +3 to +5-volt DC @ 100 mA (maximum) external power supply