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Boot Mode
QSPI (4S) - Quad Read Mode
UART
QSPI (1S) - Single Read Mode
QSPI (4S) - Quad Read UART Fallback
Mode
QSPI (1S) - Single Read UART Fallback
Mode
DevBoot
Unsupported Boot Mode
3.4 JTAG Path Selection
The AM263x Control Card allows for JTAG connections to the SoC through the on-board XDS110 or an external
emulator via the HSEC docking station. A switch (SW5) is used to drive the select line of a mux (U19) to
determine the JTAG path for the SoC. The following image shows proper switch position for SW5 for the two
JTAG paths.
SPRUJ09C – MARCH 2022 – REVISED FEBRUARY 2023
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Table 3-5. Boot-Mode Selection Table
SPI0_D0_pad
SPI0_CLK_pad
(SOP3)
0
0
0
0
0
1
All other combinations not defined above
Figure 3-8. JTAG Path Switch Position
Copyright © 2023 Texas Instruments Incorporated
(SOP2)
QSPI_D1 (SOP1)
0
0
0
0
0
1
1
0
1
0
0
1
AM263x Control Card Hardware User's Guide
Board Setup
QSPI_D0 (SOP0)
0
1
0
0
1
1
15
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