[volt-nuts] 3458A Calibration Education

[J. L. Trantham]

Chuck,

Yes. The BP-1600 is the parallel port version of the current BP-1610.  It is
still supported with new software periodically.  For the DALLAS DS1220
chips, it supports the 'AB', the 'AD', and the 'Y' variants with the ability
to specifically select each individually.

When I first got into EPROM programming, I was aware of some of the problems
created by using programmers that did not specifically list the particular
chip as being supported and I wanted a programmer to support all the 'old'
chips possible.  However, I have not measured the 'programming' pin to see
if there is voltage on it when reading.

Thanks.

Joe

-----Original Message-----
From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On
Behalf Of Chuck Harris
Sent: Thursday, November 10, 2011 11:46 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] 3458A Calibration Education


Does your programmer have a specific setting for the Dallas chip? The Dallas
chips doen't take too kindly to having an eprom's programming voltage
applied.... which some programmers do even when reading.

-Chuck Harris

J. L. Trantham wrote:
> I have successfully modified my A5 board (03458-66505) by removing the 
> EPROM (U110), the two DALLAS 1230Y NVRAM's (U121 and U122), and the 
> DALLAS 1220Y NVRAM (the 'CAL RAM', U132) and installing sockets at all 
> 4 positions.  In the process, I lost the data in the 'CAL RAM', the 
> one chip I really wanted to archive.  The chip seemed to read 
> differently each time I read it using my BP Microsystems BP-1600 
> Universal Programmer and was, clearly, not what I would have expected.  
> The two DALLAS 1230Y chips read consistently and I was able to archive 
> their data with their data in a form I would have expected.

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