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
Reserved
Rsvd
Iclk
Csel
OSPI
Rsvd
Iclk
Csel
QSPI
Rsvd
Mode
Csel
SPI
Rsvd
Rsvd
Rsvd
Reserved
Rsvd
Rsvd
Rsvd
Reserved
Bus Reset
Don't Care
Addr
I2C
Rsvd
Rsvd
UART
Port
Rsvd
Fs/raw
MMC / SD Card
Rsvd
Rsvd
eMMC
Core Volt
Mode
Lane Swap
USB
Rsvd
GPMC NAND
Rsvd
GPMC NOR
Rsvd
Rsvd
PCIe
SFDP
Read Cmd
Mode
xSPI
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
Reserved
off
on
on
UART
on
off
off
Reserved
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
Reserved
Rsvd
UART
Rsvd
Reserved
Port
MMC/SD
Rsvd
SPI
Rsvd
I2C
BOOTMODE[14:15]
- Reserved
System Description
20
AM64x GP EVM User's Guide
SPRUIX0B – FEBRUARY 2021 – REVISED MARCH 2021
Copyright © 2021 Texas Instruments Incorporated