Altera Cyclone V Boot Manual page 4

4
Boot from SD/MMC
The following table presents the possible BSEL options, together with the actual jumper settings on the
Cyclone V Development kit, rev D:
BSEL
0 Reserved
1 FPGA
2 1.8 V NAND
3 3.3 V NAND
4 1.8 V SD/MMC
5 3.3 V SD/MMC
6 1.8 V SPI or quad SPI
7 3.3 V SPI or quad SPI
There are four boot options:
• Indirect execution - When booting from flash (SD/MMC/QSPI/NAND):
1. The code is loaded by the Boot ROM from the flash to the OCRAM.
2. Run the code from this location
• Direct execution - When booting from FPGA, the Boot ROM simply jumps to an address in the FPGA
address space.
• FPGA fallback boot - If the selected boot mode fails, the Boot ROM will try to jump to a fallback image
in the FPGA, if it exists.
• RAM boot - If an Warm Boot, the System Manager can be configured so that the Boot ROM directly
jumps to a location in OCRAM.
Boot from SD/MMC
When booting from SD/MMC, two different options are available:
• Raw mode - Preloader images are located at address0 on the card.
• Partition mode - Preloader images are located at offset 0 on a custom partition with ID=A2 on the
card.
Altera Corporation
Description
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Cyclone V Dev Kit Switches
J28:BSEL0 J28:BSEL0
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HPS SoC Boot Guide - Cyclone V SoC Development Kit
2016.01.27
J28:BSEL0
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