Introduction / Context:
Part-number mnemonics in classic GAL devices often hint at available resources. For the GAL22V10, “22” indicates the maximum number of usable input signals into the logic array, and “10” indicates the number of macrocells (potential outputs).
Given Data / Assumptions:
- GAL22V10 contains 10 OLMC macrocells capable of driving outputs.
- Up to 12 pins function as dedicated inputs into the AND array.
- Package pin count and special pins (e.g., clock, OE) are not misinterpreted as outputs.
Concept / Approach:
The statement claims 12 outputs and 10 inputs, which is reversed from standard device documentation. Correctly, the device provides 10 outputs (macrocells) and 12 inputs to reach the nominal “22” total signals into the array.
Step-by-Step Solution:
Parse device code: 22V10 → 22 input terms, 10 outputs/macrocells.Map to pins: 10 outputs possible; 12 dedicated inputs available.Compare with statement → reversed → therefore incorrect.
Verification / Alternative check:
Check a GAL22V10 datasheet: pin tables and functional diagrams confirm 10 OLMC outputs.
Why Other Options Are Wrong:
Correct: Would accept the reversed counts.Depends on security-bit programming: Security bits do not change macrocell counts.Only true for QFP variant: Packaging does not invert core resources.
Common Pitfalls:
Confusing “22” as output count rather than input term count into the array.Misreading bidirectional pin capability as dedicated outputs in all modes.
Final Answer:
Incorrect
Discussion & Comments