1.10. Adaptive Logic Module (ALM)
Intel® Agilex™ devices use an enhanced adaptive logic module (ALM) similar to the previous generation Intel® Stratix® 10 and Intel® Arria® 10 FPGAs, allowing for efficient implementation of logic functions and easy conversion of IP between the devices.
The ALM block diagram shown in the following figure has eight inputs with fracturable look-up table (LUT), two dedicated embedded adders and four dedicated registers.
Key features and capabilities of the ALM include:
- High register count with 4 registers per 8-input fracturable LUT, operating in conjunction with the second generation Intel® Hyperflex™ architecture enables Intel® Agilex™ devices to maximize core performance at very high core logic utilization
- Implements select 7-input logic functions, all 6-input logic functions and two independent functions consisting of smaller LUT sizes (such as two independent 4-input LUTs) to optimize core logic utilization
- New in Intel® Agilex™ ALM architecture are two clock sources for each ALM which generate two normal clocks and two delayed clocks to drive the ALM registers; resulting in more clock domains and time-borrowing capability
- Additional fast 6 LUT and 5 LUT outputs for combinatorial functions; resulting in improved critical path for cascade of logic
- Improved register packing mode, including 5-input LUT with 2 packed register paths resulting in more efficient usage of the fabric area leading to improved critical path
- New support for latch mode in the address latch enable
The Intel® Quartus® Prime software capitalize on the ALM logic structure to deliver the highest performance, optimal logic utilization, and lowest compile times. The Intel® Quartus® Prime software simplifies design reuse as it automatically maps legacy designs into the Intel® Agilex™ FPGA’s ALM architecture.