Programming tripple supply EPROMS - TMS2716
Posted: 29 Nov 2021 23:05
There was mention some time ago of a module-2708 to program tripple supply devices 2708 and TMS2716 but I can not find any compatability information on it. The only mention says to check that it is compatible with your programmer.
I presume that there are 3 aspects to this:
1) generation of tripple supply voltages +5, +12, and -5v for Read operations
2) ability to correctly direct A0-A10, Vcc, Vbb, Vpp and CS- vs 26V pulse genration.
3) support for the old TI algorithms for 2708 and newer tms2716.
Please advise.
If need be I am quite happy to create an adapter board with Zif and inverting voltage generators.
I see that the S3 has a -8v rail for RS232, can I hijack this to feed a 79L05 to generate the -5v Vbb?
Does the S3 have separate +12v available or only as a Vpp setting, which would need to be set in the range +25v to +28v.
Thanks
Peter
I presume that there are 3 aspects to this:
1) generation of tripple supply voltages +5, +12, and -5v for Read operations
2) ability to correctly direct A0-A10, Vcc, Vbb, Vpp and CS- vs 26V pulse genration.
3) support for the old TI algorithms for 2708 and newer tms2716.
Please advise.
If need be I am quite happy to create an adapter board with Zif and inverting voltage generators.
I see that the S3 has a -8v rail for RS232, can I hijack this to feed a 79L05 to generate the -5v Vbb?
Does the S3 have separate +12v available or only as a Vpp setting, which would need to be set in the range +25v to +28v.
Thanks
Peter