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BOOTMODE[9:7] - These pins provide optional settings and are used in conjunction with the primary boot
device selected. For more details, see the device-specific TRM.
Table 3-10. Primary Boot Media Configuration BOOTMODE[9:7]
SW3.2 SW3.1 SW2.8 Primary Boot Device
RSVD RSVD RSVD RSVD
RSVD Iclk Csel OSPI
RSVD Iclk Csel QSPI
RSVD Mode Csel SPI
RSVD RSVD RSVD RSVD
RSVD RSVD RSVD RSVD
Bus Reset Don't Care Addr I2C
RSVD RSVD RSVD UART
Port RSVD Fs/raw MMC / SD Card
RSVD RSVD RSVD eMMC
Core Volt Mode Lane Swap USB
RSVD RSVD RSVD GPMC NAND
RSVD RSVD RSVD GPMC NOR
RSVD RSVD RSVD PCIe
SFDP Read Cmd Mode xSPI
RSVD RSVD RSVD No-boot / Dev-boot
BOOTMODE[12:10] - Select the backup boot mode, that is, the peripheral/memory to boot from, if primary boot
device failed.
Table 3-11. Backup Boot Mode Selection BOOTMODE[12:10]
SW3.2 SW3.1 SW2.8 Backup Boot Device Selected
off off off None (No backup mode)
off off on USB
off on off RSVD
off on on UART
on off off RSVD
on off on MMC/SD
on on off SPI
on on on I2C
BOOTMODE[13] - These pins provide optional settings and are used in conjunction with the backup boot device
devices. For more details on bit details, see the device-specific TRM. When on, switches SW3.6 sets 1 and,
when off, sets 0.
Table 3-12. Backup Boot Media Configuration BOOTMODE[13]
SW3.6 Boot Device
RSVD None
Mode USB
RSVD RSVD
RSVD UART
RSVD RSVD
Port MMC/SD
RSVD SPI
RSVD I2C
BOOTMODE[14:15] - Reserved
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SPRUJ63 – SEPTEMBER 2022
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AM64x/AM243x EVM User's Guide 21
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