1.2 Interface Logic

The embedded hard IP blocks (LSRAM, μSRAM, and Math blocks) are connected to the fabric through Interface Logic (ILs).

The following table lists the total number of ILs associated with each memory block in the PolarFire devices.

Table 1-1. ILs for Embedded Hard IP Blocks (PolarFire Devices)
Resources	MPF100		MPF200		MPF300		MPF500
Resources	No. of Blocks	No. of ILs	No. of Blocks	No. of ILs	No. of Blocks	No. of ILs	No. of Blocks	No. of ILs
LSRAM	352	12,672	616	22,176	952	34,272	1,520	54,720
μSRAM	1008	12,096	1,764	21,168	2,772	33,264	4,440	53,280
Math block	336	12,096	588	21,168	924	33,264	1,480	53,280
Total interface logic	—	36,864	—	64,512	—	100,800	—	161,280

The following table lists the total number of ILs associated with each memory block in the PolarFire SoC devices.

Table 1-2. ILs for Embedded Hard IP Blocks (PolarFire SoC Devices)
Resources	MPFS025		MPFS095		MPFS160		MPFS250		MPFS460
Resources	No. of Blocks	No. of ILs	No. of Blocks	No. of ILs	No. of Blocks	No. of ILs	No. of Blocks	No. of ILs	No. of Blocks	No. of ILs
LSRAM	84	3024	308	11088	520	18720	812	29232	1460	52560
μSRAM	204	2448	876	10512	1494	17928	2352	28224	4260	51120
Math block	68	2448	292	10512	498	17928	784	28224	1420	51120
Total interface logic	—	7920	—	32112	—	54576	—	85680	—	154800

The following table lists the total number of ILs associated with each memory block in the RT PolarFire devices.

Table 1-3. ILs for Embedded Hard IP Blocks (RT PolarFire Devices)
Resources	RT PolarFire® Devices
Resources	No. of Blocks	No. of ILs
LSRAM	1,520	54,720
μSRAM	4,440	53,280
Math block	1,480	53,280
Total interface logic	—	161,280

The following table lists the total number of ILs associated with each memory block in the RT PolarFire SoC devices.

Table 1-4. ILs for Embedded Hard IP Blocks (RT PolarFire SoC Devices)
Resources	RTPFS160		RTPFS460
Resources	No. of Blocks	No. of ILs	No. of Blocks	No. of ILs
LSRAM	520	18720	1460	52560
μSRAM	1494	17928	4260	51120
Math block	498	17928	1420	51120
Total interface logic	—	54576	—	154800

The ILs are structurally similar to LEs with a 4-input LUT and D-type flip-flop, but without a dedicated carry chain, as shown in the following figure.

Figure 1-2. Functional Block Diagram of Interface Logic

Each LSRAM and Math block is associated with 36 ILs, and each μSRAM is associated with 12 ILs. For more information, see Figure 2, Figure 3, and Figure 4.

If an embedded hard IP block is used in a design, the associated ILs connect the ports of the embedded hard IP blocks to the fabric routing. Any IL that is not utilized by an embedded hard IP block is automatically available for user logic.

Figure 1-3. LSRAM Interfacing with ILs in a Row

Figure 1-4. Math Block Interfacing with ILs in a Row

Figure 1-5. μSRAMs Interfacing with ILs in a Row