SPRUJB5 February 2024 AM67 , AM67A , TDA4AEN-Q1 , TDA4VEN-Q1
The boot mode for the EVM is defined by two banks of dip switches [SW3, SW4]. These switch settings are mapped directly to the BOOTMODE pins of the processor. See the technical reference manual (TRM) of the processor for a complete definition of all supported boot modes.
As shown in the diagram, the BOOTMODE order is reversed from the Dip Switch assignment. For example, BOOTMODE [2:0] selects the PLL configuration. The EVM uses a 25Mhz clock source, thus BOOTMODE [2:0] must be set to '011'. Dip switch SW3[1:3] must be set to ON-ON-OFF or ‘110’ (order reversed).
The default setting of the EVM is configured for Micro SD card boot. The boot settings are:
SW3[1:8] = 1100 0010 and SW4[1:8] = 0100 0000
Another common boot configuration is No-Boot. This is used when downloading code using an emulator/XDS110. That boot settings is:
SW3[1:8] = 1101 1111 and SW4[1:8] = 0000 0000
Other boot modes such as eMMC, Serial Flash, USB, Ethernet, and UART are supported. Please refer to processor's TRM for specific settings and complete list of supported modes.
Processor Boot Source | SW2.1 | SW2.2 | SW2.3 |
---|---|---|---|
MicroSD Card [J32] | OFF | OFF | OFF |
Non-Volatile Flash (xSPI) | OFF | OFF | ON |
eMMC | ON | ON | OFF |
Reserved | OFF | ON | ON |
UART (for Flashing) | ON | OFF | ON |
No Boot (JTAG/Emulator) | ON | OFF | OFF |
Ethernet[J10] | OFF | ON | OFF |