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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Selecting external vs internal flash Robert Wey I doubt this is an SFR bit considering it determines the source of opcode fetches. If security level 1 is programmed, EA will be internally latched on Reset.
wt89c51ed2 How do I set it? Selecting external vs internal flash Alexandra Carey Yes, that answers my question. Selecting external vs internal flash erik malund Hertel, a little boo-boo: That may eliminate the error. No need to repeat yourself.
So the Atmel bootloader tries to run at address Fh. Is that not clear? Selecting external vs internal flash Alexandra Carey I would like to set a fuse? I must have slept well last night: And what does the subject do with AT89C51 indicated in your post?
Read-Only Author erik malund Posted 6-Dec Plus, the data sheet does not say how. The correct address is F, according to my data sheet. My understanding is that, at this point, the processor tries to execute instruction at address Fh on the external PEROM, thinking it’s running the bootloader.
Maybe this section of the Datasheet is what you were looking for: I indicated that original poster has used part name “AT89C51” in the body of the message.
I do not see this higher up Erik. If this is not an SFR bit, then perhaps its something you set with an option in a device programmer? Selecting external vs internal flash J Guy FC03 is wrong. If it were, you’d be changing your code source on the fly which ni be a bit tricky to manage. Selecting external vs internal flash Alexandra Carey Oh. Selecting external vs internal flash A8t9c51ed2 Carey Same topic, new problem: Indeed, I know, I use this chip.
Also be sure to read the posts above about software programming of the BLJB. As this is Monday I hope to be excused. Am I correct that wt89c51ed2 is what is happening?
Products Download Events Support Videos. Selecting external vs internal flash erik malund No need to repeat yourself repeat???
!!HELP:ATMEL AT89C51ED2’S FLASH FAIL
Selecting external vs internal flash Robert Wey I do not see this higher up It was a joke. EA is a pin on your controller.
Selecting external vs internal flash Andrew Neil You “set” a bit by writing a ‘1’ to it.