Motorola M68HC11EVBD, User Manual

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OPERATING INSTRUCTIONS
4-4 M68HC11EVBU/D
At the start of this procedure, the PC will be operating a terminal emulator program such as
PROCOMM, KERMIT, MacTerminal, or Red Ryder; and the BUFFALO prompt > will be
displayed. First change the BAUD register from $30 (selects default 9600 baud rate for SCI) to
$35 (to select 300 baud) with a memory modify (MM) command as follows:
>MM 102B<CR>
BOLD entries are user entered on the terminal keyboard.
102B 30 35<CR>
Since the communication baud rate changes when pressing the carriage return <CR> key after
typing 35, you may observe a few invalid characters on the terminal display screen which can be
ignored.
Next change the communication program baud rate to 300 baud. If using an IBM-PC with a
PROCOMM terminal emulator program, use the alt-P window. Hold down the (alt ) keyboard
key while pressing the p keyboard key. A window appears on the terminal display screen to
change the baud rate. If using an Apple Macintosh with a MacTerminal terminal emulator
program, use the pull-down menu to change the baud rate.
Next press the keyboard <CR> key to resume communications with the EVBU as follows:
<CR>
102B 35<CR>
>
At this point all BUFFALO commands should operate normally except the display will be
noticeably slower due to the slow baud rate.
To download the S-record file to the EVBU EEPROM, type the LOAD T command and a
carriage return as follows:
>LOAD T<CR>
At this point BUFFALO is waiting for the S-record file from the PC. Instruct the PC to send the
S-record file to the EVBU using simple ASCII file transfer protocol. If using an IBM-PC, use the
alt-S window to setup the American standard code for information interchange (ASCII) transfer
perimeters (this only needs to be performed once). To invoke the file transfer, press the page-up
keyboard key (may be shared with the 9 key on the numeric keypad on some PC keyboards), and
follow instructions on the display screen. If using a Apple Macintosh, use the pull-down menu to
send the file.
Upon completion of the S-record transfer, the following message is displayed on the terminal
display screen:
done
>