The AT89C51ED2 pro- vides bytes of EEPROM for nonvolatile data storage . In addition, the AT89C51RD2/ED2 has a Programmable Counter Array. AT89C51EDCSIM Microchip Technology / Atmel 8-bit Microcontrollers – MCU 80C31 w/4k datasheet, inventory, & pricing. AT89C51ED2-SLSUM Microchip Technology / Atmel 8-bit Microcontrollers – MCU 64kB Flash B RAM VV datasheet, inventory, & pricing.
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That may eliminate the error. Selecting external vs internal flash Alexandra Carey Same topic, new problem: Is there an elegant solution? See Table 76 of doc Selecting external vs internal flash.
I do not see this higher up Erik. As this is Monday I hope to be excused. Plus, the data sheet does not say how. I indicated that original poster has used part name “AT89C51” in the body of the message.
If the EA pin is tied low, all program memory fetches are from external memory. Is that not clear?
The BLBJ bit is by default 0. As about the question then the things are simple: Also be sure to read the posts above about software programming of the BLJB. No, it is not clear. But here I re-post original message the first message in the thread: Oh how many times has someone tried to “debug” what was a at889c51ed2 misunderstanding. Selecting external vs internal flash Alexandra Carey I would like to set a fuse? Selecting external vs internal flash Alexandra Carey That’s what the data sheet says.
!!HELP:ATMEL AT89C51ED2’S FLASH FAIL
Selecting external vs internal flash Robert Wey I do not see this higher up It was a joke. Selecting external vs internal flash Stefan Duncanson “This page http: If it were, you’d be changing your code source on the fly which might be a bit tricky to manage.
AT89C51ED2: Selecting external vs internal flash
Am I correct that this is what is happening? Selecting external vs internal flash J Guy FC03 is wrong. If security level 1 is programmed, EA will be internally latched on Reset.
Selecting external vs internal flash Robert Wey I hear ya. Philips cured some “chip errors” of goinig into ISP by making FC00 a jump to 0 so runaway programs did no cause a report of a chip malfunction. I would like to set a at89c51ev2
Indeed, I know, I use this chip. It can be modified by software.
Selecting external vs internal flash Alexandra Carey Oh. If this is not an SFR bit, then perhaps its something you set with ta89c51ed2 option in a device programmer?