Exel 93c46 eeprom problem with S4

[Guest]

Hi
I have serial lib 3.11 and am trying to program a exel 93c46p device. I set the S4 at exel 93c46 and it reads the device with out problems but when i change the data and 'burn' it back it fails everytime with the S4 showing the ram/rom difference. If i change just the first location (from ff to 00)it will sometimes change it correctly but won't change it back again when i try again (from 00 to ff).I have 3 of these devices now and they all do the same. anyone have any ideas?? Or is it just my S4 or is it me?? (my s4 has a serial in the 17xxx range) many thanks
Andrew Finn

[Dataman (Neil Parker)]

Hi,

I have used S4 serial library v3.11 and Catalyst 93C46 chips OK.
Please, note that there are two S4 serial adaptors from Dataman:
a. ZIF16 - 93Cxx devices should be inserted from the top.
b. ZIF24 - 93Cxx devices should be placed in the middle of ZIF24, i.e. starting from pin 5 of ZIF24.

If you have made the adaptor yourself, can you email us the description, please?

The serial adaptor for 17xxx devices will not program 93Cxxx devices.

Best regards,

Neil

[Guest]

Hi Neil thanks for the reply
I am using a homemade adaptor using the following.....

---s4------93c46 chip
pin 02-----pin 1 CS
pin 24-----pin 2 CLOCK
pin 22-----pin 3 DI
pin 13-----pin 4 DO
pin 16-----pin 5 GND
-------------pin 6 N/C
-------------pin 7 N/C
pin 32-----pin 8 VCC

Is this adaptor right? is there something i have missed?
Many thanks for your help
Regards
Andrew Finn

[Dataman (Neil Parker)]

Hi,

Please download this file http://www.dataman.com/files/S4/S4_Serial_Adaptors.zip which contains the details of the serial module.

Neil