motorola, inc., 1999 M68EVB912B32/d rev. 1 semiconductor products sector M68EVB912B32 evaluation board overview the M68EVB912B32 evaluation board (evb) is an economical tool for designing and debugging code for and evaluating the operation of the mc68hc912b32 mcu. by providing the essential mcu timing and input/output (i/o) circuitry, the evb simplifies user evaluation of prototype hardware and software. the evb features a prototype area, which allows custom interfacing with the mcu? i/o and bus lines. these connections are broken out via on-board headers immediately adjacent to the mcu. figure 1 shows the evb? layout and locations of the major components as viewed from the component side of the board. figure 1. evaluation board layout mc68hc912b32mcu reset switch rs-232c power background background prototype v pp input connector connector debug mode in debug mode out area db-9
M68EVB912B32 evaluation board 2 features motorola features +4.5 to +5.5 vdc operation rs-232c interface 32 kbytes of mcu internal flash eeprom with resident d-bug12 monitor/debugger program four operational modes: evb jump-to-eeprom bdm pod (background debug mode) bootload header connectors for access to the mcu? 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 iasm12 assembly language development toolkit file transfer capability from a host computer, allowing off-board code generation components the evb is composed of three components: 1. hardware ?the board is a 5.15-inch x 3.4-inch (13.08-cm x 8.63-cm) multilayer printed circuit board (pcb) that provides the platform for interface and power connections to the mc68hc912b32 mcu. the mcu is surface mounted to the pcb. 2. firmware ?d-bug12, the evb? firmware-resident monitor program, provides a self-contained operating environment that allows writing, evaluating, and debugging user programs. the hardware is factory configured to execute d-bug12 without further configuration by the user. it is ready for writing and debugging user code with an rs-232c terminal. commands are typed on the terminal? d-bug12 prompt line and executed when the carriage return ( enter ) key is pressed. d-bug12 then displays either the appropriate response to the command or an error indication. 3. software ?the isam12 assembly language toolset provides an integrated development environment which includes a project manager, relocatable macro-assembler, linker, librarian, motorola s-record generator, and a variety of other tools.
M68EVB912B32 evaluation board motorola user code generation 3 user code generation evb user code can be generated by two methods: 1. for small programs or subroutines, d-bug12? single-line assembler/disassembler may be used to place object code directly into the evb? memory. 2. for larger programs, the iasm12 assembler may be used on a host computer to generate s-record object files, which then can be loaded into the evb? memory using d-bug12? fload or load command. if the m68hc912b32? bdm interface serves as the user interface, the sci (serial communication interface) port becomes available for user applications. this mode requires a background debug development tool, such as motorola? sdi ? interface, and a host computer with the appropriate interface software or another b32evb. at reset, the evb can begin operation in either of four jumper-selectable modes: 1. in evb mode, d-bug12 immediately issues its command prompt on the terminal display and waits for a user entry. 2. in the jump-to-eeprom mode, execution begins directly with the user code in on-chip eeprom. 3. in bdm pod mode, d-bug12 serves as a probe interface between a target system and the user via the bdm out connector. 4. in bootload mode, a user program may be loaded into the host evb? byte-erasable or flash eeprom memory. evb specifications and pc requirements information in these tables summarizes evb specifications and minimum host pc requirements. table 1. evb speci?ations characteristic specification mcu mc68hc912b32 mcu i/o ports hcmos compatible flash 32 kbytes eeprom 768 bytes communications ports 2 rs-232c dce ports board dimensions 5.15 inches x 3.4 inches; 13.08 cm x 8.63 cm sram 1 kbyte
non-disclosure agreement required M68EVB912B32 evaluation board M68EVB912B32/d motorola, inc., 1999 motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, representation or guarantee r egarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the application or use of any product or circuit, and speci cally disclaims any and all liability, including without limitation consequential or incidental damages. "typical" parameters which may be provided in motorola data sheets and/or speci ?ations can and do vary in different applications and actual performance may vary over time. all operating parameters, including "typicals" must be validated for each customer applica tion by customer's technical experts. motorola does not convey any license under its patent rights nor the rights of others. motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failu re of the motorola product could create a situation where personal injury or death may occur. should buyer purchase or use motorola products for any such unintended or unauthorized applicati on, buyer shall indemnify and hold motorola and its of?ers, employees, subsidiaries, af?iates, and distributors harmless against all claims, costs, damages, and expenses, and rea sonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that mot orola was negligent regarding the design or manufacture of the part. motorola and are registered trademarks of motorola, inc. motorola, inc. is an equal opportuni ty/af?mative action employer. how to reach us: usa/europe/locations not listed: motorola literature distribution, p.o. box 5405, denver, colorado 80217, 1-303-675-2140 or 1-800-441-2447. customer focus center, 1-800-521-6274 japan: motorola japan ltd.; sps, technical information center, 3-20-1, minami-azabu, minato-ku, tokyo, 106-8573 japan. 81-3-3440-8573 asia/pacific: motorola semiconductors h.k. ltd.; silicon harbour centre, 2 dai king street, tai po industrial estate, tai po, n.t., hong kong. 852-26668334 mfax , motorola fax back system: rmfax0@email.sps.mot.com; http://sps.motorola.com/mfax/; touchtone, 1-602-244-6609; us and canada only, 1-800-774-1848 home page: http://motorola.com/sps/ mfax is a trademark of motorola, inc. ordering information refer to table 3 for ordering information. for a list of the motorola sales offices and distributors, visit http://www.mcu.motsps.com/sale_off.html. warranty motorola provides a 1-year limited warranty. sdi is a trademark of motorola, inc. table 2. host pc minimum requirements characteristic specification terminal rs-232c compatible terminal host pc, optional 386-based pc or higher with an rs-232c serial port; requires a user-supplied communications program capable of emulating a dumb terminal input/output serial communication port cable rs232c compatible, 6-pin bdm target cable external power supply +4.5 to +5.5 vdc @ 100 ma maximum table 3. ordering information evaluated mcu evb part number software mc68hc912b32fu8 M68EVB912B32 iasm12, included with evb
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