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Atmel 93C46 wrong soldered

S

Stephan Mees

Jan 1, 1970
0
Hi,

hope someone can help: a Broadcom based network card with an external
EEPROM 93C46 was in a repair session. Someone soldered the EEPROM with
Pin1 to pin5. Question: can the chip be destroyed by this and what about
the EEPROM contents? CS was on GND and DO on VCC...

Thanks a lot
Stephan
 
J

JW

Jan 1, 1970
0
Hi,

hope someone can help: a Broadcom based network card with an external
EEPROM 93C46 was in a repair session. Someone soldered the EEPROM with
Pin1 to pin5. Question: can the chip be destroyed by this

Not likely. One thing to be aware of - on a rotated SOIC pin 1 is a no
connect. For an Atmel part, there would be an "R" in the part #.
and what about
the EEPROM contents? CS was on GND and DO on VCC...

With CS tied to ground, the chip would go into standby mode and be
unreadable. Apparently, someone wanted to keep the NIC from accessing
where the MAC address is stored. Why? You got me...

Is there another programmable device on the PCB?
 
S

Stephan Mees

Jan 1, 1970
0
Hi,
Not likely. One thing to be aware of - on a rotated SOIC pin 1 is a no
connect. For an Atmel part, there would be an "R" in the part #.

This makes me hope
With CS tied to ground, the chip would go into standby mode and be
unreadable. Apparently, someone wanted to keep the NIC from accessing
where the MAC address is stored. Why? You got me...

Hmm, i am pretty sure, that someone just made an error ;-)
Is there another programmable device on the PCB?

no,
but i found one person at my company, who will resolder the chip, (they
repair mobile phones), i will post the result here

Thanks a lot for your answer
Stephan
 
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