Due to the battery in our (automotive test equipment) design , we need the LM4F120 to run at 3.0V (very preferably) or 3.1V (worst case). The datasheet for the LM4F120 states:
This looks great. 3.0V operating should be (just) possible.
Then we read the errata. Errata item 2.8 talks about a problem with the power-on reset and brown-out reset circuits. At one point it states:
This also results in a change of the minimum operating voltage to 3.05 V.
At the end it states:
This issue will be resolved in B0 silicon. If designing for B0 silicon, design for VDD (Min) specification of 3.15 V.
Silicon Revision Affected:
A1, A3
Fixed:
Fixed on B0.
I don't understand the meaning of "fixed" here. If it's going to be "fixed" for silicon revision B0, is it too unreasonable to assume the part will meet specification and operate at 2.97V? Is there a typo in here somewhere? Right now I'm interpreting all this for minimum VDD as:
- Current datasheet specification: 2.97V
- Rev A1 / A3: 3.05V
- Rev B0: 3.15V
This doesn't look like a "fix" to me. In fact it looks like successive revisions are getting worse, not better. Is this correct?
Thanks.