Joe, The NI GPIB-232CV-A uses an ST M27C256B-15C1 One Time PROM in a PLCC 32 pin package. However, a Winbond W27E257 EEPROM is a pin for pin substitute. The M27C256B and the W27E257 both come in a 28 pin DIP package (0.6 spacing) so you should be able to use a programmer with that chip support and a DIP to PLCC adapter, wired appropriately, to do the programming. The 28 pin DIP packages are UV erasable. I've never seen a PLCC UV erasable package. Do they exist?
In any event, I can program the chip for you if needed. I have some spare W27E257P-10 chips and can burn one for you as well and send it to you if needed. I am in Northwest Florida. Joe -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Joseph Gray Sent: Sunday, March 18, 2012 2:18 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] IOTECH 488 EPROM The text file accompanying the EPROM file on KO4BB's site mentions using this EPROM image with a NI controller. I have a NI GPIB-232CV-A. Can I use the image with this controller? If so, I assume that I then have the equivalent of an IOTECH controller? I partially disassembled my GPIB-232CV-A and from peering between the boards, it looks like the EPROM is a PLCC. I can't burn one of those. If I can use this image with my controller, can someone burn a chip for me? I'll pay for the chip and shipping, of course. Joe Gray W5JG _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
