Intel 28F016SV Flash Device

[Singapura]

intel flash device

Hi

There's no category for memory devices (?) so I thot I'd post it here.

I'm currently writing an in-circuit test program to erase and program the Intel 28F016SV on the Teradyne Spectrum. I've no problem reading and dumping the contents into a binary file, but when I tried erasing a block, I encountered an error because the BSR lock-bits are locked upon device power-up. I've checked the datasheet but there seems to be no command to unlock the block of interest.

I'm aware that later versions of flash memories have lock/unlock functions built-in, but this chip does not seem to. Am I missing something here? Can anyone with experience on this chip provide me with some insight?

Thanks in advance!

 

[Singapura]

Managed to solve the problem.

The 28F016SV does not have the unlock command. Instead, the #WP signal controls whether locked blocks can or cannot be written. Also, Vpp must be at the correct voltage level (5Vdc or 12Vdc) in order for write/erase to operate.

Intel could have make their datasheet clearer to avoid confusing newbies like me.