The smallest Kintex UltraScale device, the KU025, has a reduced set of configuration features. The KU025 does not support RSA authentication, SEU mitigation (SEM) IP, or post-configuration CRC.
The following table summarizes the differences between the 7 series and UltraScale families, including the features that are restricted in the Kintex UltraScale KU025 device.
| Feature | 7 series | Kintex UltraScale and Virtex UltraScale | Artix UltraScale+, Kintex UltraScale+, and Virtex UltraScale+ |
|---|---|---|---|
| Internal CCLK | < 100 MHz | > 100 MHz | > 100 MHz |
| POR_OVERRIDE | No | Yes | Yes |
| SEM IP | Yes, uses FRAME_ECCE2 | Yes (except KU025), faster, uses enhanced FRAME_ECCE3 | Yes, faster, uses enhanced FRAME_ECCE4 |
| Readback CRC | Yes | No, use SEM IP instead (SEM IP is not supported in KU025) | No, use SEM IP instead |
| Encryption | AES-CBC | AES-GCM; similar performance to standard configuration | AES-GCM; similar performance to standard configuration |
| Authentication | HMAC | AES-GCM and RSA (except KU025) | AES-GCM and RSA |
| Device DNA | DNA_PORT, 57 bits | DNA_PORTE2, 96 bits | DNA_PORTE2, 96 bits |
| Bank 0 Voltage | 1.5V-3.3V | 1.5V-3.3V | 1.5V-1.8V |
| Multi-function bank voltage | 1.5V-3.3V | Kintex except KU095: 1.5V-3.3V Virtex and KU095: 1.5V-1.8V | 1.5V-1.8V |
| Multi-function banks | 14, 15 | 65 | 65 |
| RDWR_B and FCS_B Pins | RDWR_B, FCS_B separate, multi-function | RDWR_FCS_B combined, dedicated | RDWR_FCS_B combined, dedicated |
| D[03:00], PUDC_B | Multi-function, not included in STARTUPE2 | Dedicated, included in STARTUPE3 | Dedicated, included in STARTUPE3 |
| MCAP | N/A | Yes | Yes |
| MASTER_JTAG | N/A | Yes | Yes |
| CAPTUREE2 | Yes | No | No |
| ICAP | ICAPE2; 16-bit, 32-bit | ICAPE3; 32-bit, additional status signals | ICAPE3; 32-bit, additional status signals |