Product number (P/N): AU2271,
Keywords/Tags: AU2271
Date of intro-: ~1970, TimeKeeper IC's (sorted by Year): (Link),
Classification: / Part / Calculator-ChipSet,
Featuring: Logic-technology: LSI (Large Scale Integration), calculator-chipset,
Serie-members: ROCKWELL_parts(E): AU2271 (ChipSet); SHARP_parts(E): AU2271 (ChipSet),
Info: The AU2271 was the ‘heavy lifter’ or the muscle of the ROCKWELL chipset.
While the other chips handled organization and formatting, this was the specific location where the actual mathematics took place
Primary Function:
The Arithmetic Unit (The ‘AU’ stands for Arithmetic Unit).
It functioned as the computational core of the system:
Mathematical Operations:
It performed the four basic functions: addition, subtraction, multiplication, and division.
Logic Processing:
It processed data using Binary Coded Decimal (BCD) logic, which was the standard for calculators to ensure that decimal math remained human-readable and accurate.
The Workflow:
It took instructions from the AC2261 (which told it what operation to perform) and sent the raw numerical result to the DC2266 (which decided where the decimal point belonged).
Used in: DummyBrand: QT8D, SHARP: EL160, SHARP: QT8B, SHARP: QT8D, SHARP_parts(E): 4041PCBC1 (PCB), SHARP_parts(E): 4041PCBD2 (PCB), SHARP_parts(E): 436PCBC11 (PCB)