On Jan 4, 2009, at 6:58 PM, Curtis H. Wilbar Jr. wrote:
Trying to ID some chips I pulled from various pieces
of equipment.
I have a cpu? I pulled out of a modem ... Signetics
SC80C31BCPN40. This would appear to be an Intel 8031 based
cpu. But does it have an internal ROM/etc that would preclude
its reuse ?
Nope...the 8031 is the ROM-less version of the 8051.
I have 3 chips now in the trash pile... I believe they
are OTP EPROMs
(and since used, are no good). MX 27C1000PC-70, ATMEL
AT27LV256A, and AtMel AT27C010-70JC.
They're definitely EPROMs, and they're OTP unless they have a window.
Lastly I have what I think is EEPROM. SST
PH29EE010-150-4CF.
I believe this to be a 1Mbit EEPROM.
Searching google for chip part numbers is paramount to useless
due to all the chip vendors advertising.... there has to be a better
way....
Nope, there's no better way...it's just tedious and time-
consuming. The 29EE010 is indeed a 1Mb EEPROM. I have the datasheet
here:
http://www.neurotica.com/misc/SST29EE010.pdf
Is an 8031 cpu 'fun' to play with ? :-)
Some people say no, some people say yes. Personally I love the
8051 architecture. I've done tons of stuff with 8051
implementations, both at home and at work...been working with them
for close to twenty years now. It's one of the best-supported
microcontroller architectures out there.
-Dave
--
Dave McGuire
Port Charlotte, FL