Motorola CME-12D60 Programming Flash EEPROM, #$7FE initialize the stack pointer, $fffe, Start

Programming Flash EEPROM

After debugging, you can program your application into Flash Memory so it executes automatically when you apply power to the board as follows:

1.Make a backup copy of HELLO.ASM then use a text editor to modify it. Remove the comment ; character before the following line to initialize the stack pointer which is necessary when running outside of a debugger:

LDS #$7FE ; initialize the stack pointer

2.Remove the comment ; character from before the following 2 lines at the end, to set the reset vector to go to the beginning of the program (the label START) when powered on:

org	$fffe	reset vector
	fdb	START

3.Re-Assemble HELLO.ASM as described in the "Assembling Source Code" section.

4.Select Program from the AxIDE menu and follow the message prompts. When prompted for a file name, enter the new HELLO.S19 file.

5.Set the CONFIG SWITCH positions 1-5 all ON. The red VPP light should come on.

6.Press the RESET button on the board before clicking OK. When prompted to Erase, choose Yes.

7.When finished programming, REMOVE POWER then set the CONFIG SWITCH positions 1-5 all OFF. The VPP light should turn off.

8.Re-Apply Power to the board. Your new program should start automatically and the “Hello World” prompt should be displayed in the terminal window.

To return to the Mon12 monitor program, set the CONFIG SWITCH positions 1-4 all back ON then press RESET.

8