[FRAM71] Pre-Production Batch

[Hans Brueggemann]

(06-09-2015 05:03 PM)Dave Frederickson Wrote:  Are there any other differences between the HW104 modules, besides the programming header being pre-installed on the later batch?

the pre-production batch was originally fully equipped with an auto power-off feature, that brought the current consumption down to just a few microamps, approx. 10 minutes after the HP-71B had been switched off. however, that feature wasn't compatible with having an alternate O/S activated. thus, the full-off feature was deactivated on all pre-production modules, but they still carry some of the components of that subcircuit. modules from the production batch no longer have these parts on board. power cunsumption figures in the manual refer to a -512 module from the production batch.

hans