The boot interfaces are divided into autonomous and supervised. The autonomous modes require a simple flash memory interface. The supervisor boot modes require an external controller connected to the JTAG or SMAP interface.
Autonomous Boot Interface Implementations
The following table summarizes the implementations for the flash boot interfaces.
| Device Generation | OSPI | QSPI | SD | eMMC | NAND |
|---|---|---|---|---|---|
| UltraScale+ MPSoC | Not available | 24-bit, 32-bit addressing | v2.0/3.0 via SD_eMMC combination controller | v4.51 via SD_eMMC combination controller | 8-bit ONFI v3.1 (512 Gb) |
| Versal device | 8-bit data |
1-bit, 2-bit, 4-bit (single or dual-stacked), or 8-bit (dual-parallel) |
v2.0/3.0 via SD_eMMC combination controller | v4.51 via SD_eMMC combination controller | Not available 1 |
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Supervised Boot Interface Implementations
| Device Generation | USB | JTAG | SelectMap |
|---|---|---|---|
| UltraScale+ MPSoC | v2.0 | PS JTAG and PL JTAG controller interfaces | Not available |
| Versal device | USB boot not available | PMC JTAG controller interface | 8-bit, 16-bit, and 32-bit with SMAP Busy monitoring 1 |
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The Versal device's new PMC centralized integration provides support for basic boot and configuration, Dynamic Function eXchange (DFX), power management, and reliability and safety functions from a single controller. The PMC bus architecture enables significantly faster configuration when compared with previous architectures. The following table summarizes the boot mode differences between architectures.
| Mode | Virtex UltraScale+ or Kintex UltraScale+ FPGA | Zynq UltraScale+ MPSoC or Zynq UltraScale+ RFSoC | Versal Adaptive SoC |
|---|---|---|---|
| JTAG | Yes | Yes | Yes |
| OSPI | – | – | Yes |
| QSPI32 |
Yes |
Yes |
Yes |
| QSPI24 |
Yes |
Yes |
Yes |
| SelectMAP | Yes | – | Yes 1 |
| eMMC1 (4.51) | – | Yes | Yes |
| SD1 (3.0) | – | Yes | Yes |
| SD1 (2.0) | – | Yes | Yes |
| SD0 (3.0) | – | – | Yes |
| SD0 (2.0) | – | Yes | – |
| PJTAG_0 | – | – | – |
| PJTAG_1 | – | Yes | – |
| Serial | Yes | – | – |
| BPI | Yes | – | Note 2 |
| NAND | – | Yes | Note 2 |
| USB (2.0) | – | Yes | – |
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