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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EA is a pin on your controller. No need to repeat yourself. Is there an elegant solution?
Selecting external vs internal flash Robert Wey I do not see this higher up It was a joke. Maybe this section of the Datasheet is what you were looking for: Selecting external vs internal flash Walt Conley Try putting at89c1ed2 zero in front of your Fh.
Selecting external vs internal flash erik malund FC03 is wrong.
The BLBJ bit is by default 0. Is is just me, or does that seem odd to anyone else, since it’s not divisible by 4? Selecting external vs internal flash Robert Wey I doubt this is an SFR bit considering it determines the source of opcode fetches.
Is that not clear?
I must have slept well last night: See Table 76 of doc But I told that in original message body poster has indicated AT89C If security level 1 is programmed, EA will be internally latched on Reset. That’s usually the way I am all week. Selecting external vs internal flash Robert Wey The pin is! How do I set it? As this is Monday I hope to be excused. The only modification that can be made is to program memory on the flash.
Oh how many times has someone tried to “debug” what was a at89c51ex2 misunderstanding. Selecting external vs internal flash erik malund I am sorry being so daft.
Selecting external vs internal flash Alexandra Carey Same topic, new problem: At89c51ec2 for being patient — I’m new at this and want to double-check everything before I make a huge ass of myself.
Selecting external vs internal flash Robert Wey I hear ya. No, it is not clear. If the EA pin is tied low, all program memory fetches are from external memory.
It can be modified by software.
I would like to set a fuse? So it may be possible that this can be accomplished with FLIP. I indicated that original poster has used part name “AT89C51” in the body of the message.
Maybe just due typpo. Selecting external vs internal flash J Guy FC03 is wrong. Indeed, I know, I use this chip. That may eliminate the error. Selecting external vs at98c51ed2 flash erik malund Andy, are you getting soft you asked the poster to find it in the datasheet and ended up finding it for him: The correct address is F, according to my data sheet.
AT89C51ED2: Selecting external vs internal flash
Selecting external vs internal flash Keil Support, Intl. Selecting external vs internal flash Oleg Sergeev hi, it seems, my English is so bad that nobody understands what I said.
Selecting external vs internal flash.
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. 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.