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Preliminary User's Manual l TQMa65xx UM 0001 l © 2021, TQ-Systems GmbH
Page 12
3.2
System components
3.2.1
AM65xx CPU
Depending on the TQMa65xx version, one of the following AM65xx derivatives is assembled:
•
AM6526
•
AM6527
•
AM6528
•
AM6546
•
AM6548
Attention: Destruction or malfunction, AM65xx errata
Please take note of the current AM65xx errata (3).
Attention: MMCSD peripherals, no HS400 mode
MMCSD peripherals do not support the Multimedia Card HS400 mode.
Please take note of the current AM65xx errata (3).
3.2.1.1
Boot Mode
The Boot Mode configuration of the AM65xx is selected via boot strapping pins when the reset is released.
At this time the correct levels must be applied to the corresponding AM65XX pins to ensure the desired configuration.
More information about boot interfaces and its configuration is to be taken from the AM65xx Data Sheet (1) and the AM65xx
Reference Manual (2).
Standard boot devices are, e.g. the eMMC or the QSPI NOR flash on the TQMa65xx, or an SD card on the carrier board.
The boot configuration pins are multiplexed. For this reason, tri-state buffers should be used for other usage of these pins.
Note: Field software updates
When designing a carrier board, it is recommended to have a redundant update concept for field
software updates.