I'm using a different processor but also CW7.1; I have a dialog box under Debug -> ColdFire -> Load/Save Memory, from which I can save memory to a file, like:
20001200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................
20001210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................
Will that do what you need?