AT89C51ED2: Selecting external vs internal flash

I would like to set a (fuse?) bit to select the external Flash/PEROM as program memory instead of default Flash internal to the AT89C51. Is the BLJB bit the one I want to set? How do I set it?
AT89C51ED2: Selecting external vs internal flash

I would like to set a (fuse?) bit to select the external Flash/PEROM as program memory instead of default Flash internal to the AT89C51. Is the BLJB bit the one I want to set? How do I set it?
Run the code from an external flash memory or RAM.

Hi, Is it possible to run the code from an external flash memory or RAM? We are running out of space in our K60. We don’t want to change the whole processor. So I was wondering if there is a possibility...
Run the code from an external flash memory or RAM.

Hi, Is it possible to run the code from an external flash memory or RAM? We are running out of space in our K60. We don’t want to change the whole processor. So I was wondering if there is a possibility...
Rading code from AT89C51ED2

Hello!I have a board with the AT89c51ED2 processor. It's work, I see Clock oscillator with my oscilloscope , but doesn't work serial comunication. Somebody Have burnout those ports, and the chip MAX202...