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System Block Diagram
Primary Boot Mode Config: BOOTMODE [09:07] – These pins provide optional configurations for primary boot
and are used in conjunction with the boot mode selected.
Backup Boot Mode: BOOTMODE [12:10] – Select the backup boot mode, that is, the peripheral/memory to
boot from, if primary boot fails.
Backup Boot Mode Config: BOOTMODE [13] – This pin provides optional configurations for the backup boot
devices.
Reserved: BOOTMODE [15:14] – Reserved pins.
Key considerations for boot mode configuration:
•
TI recommends including provision to configure boot modes used during development, such as UART boot or
No-boot mode for JTAG debug.
•
Boot pins have other functions after reset. Ensure the board design takes this into account when choosing
pullup/pulldown resistors for the boot pins. If these pins are driven by another device, they must return to the
proper boot configuration levels whenever the device is reset (indicated by the PORz_OUT pin) to enable it to
boot properly.
•
The functionality of some boot mode pins are reserved. These pins should not be left floating and must be
terminated (pullup or pulldown). For details regarding termination of reserved boot mode pins, see the Boot
Mode Pins section of the Initialization chapter of the device-specific TRM.
For details regarding boot modes, see the Initialization chapter of the device-specific TRM.
It is the designers responsibility to set the boot mode configuration (via pullups or pulldowns, and
optionally jumpers/switches) depending on the desired boot scenario.
2.3 Confirming Pin Multiplexing Compatibility
The processor contains a number of peripheral interfaces. To optimize size, pin count, package cost while
maintaining maximum functionality, many of the device pads (pins) can multiplex up to eight signal functions.
Thus, not all peripheral interface instances can be used simultaneously.
Texas Instruments has developed
function using pin-multiplexing configuration too for their AM62A7/AM62A3 based board design.
The pinmux configuration generated using SysConfig-PinMux Tool for the design should be saved
along with other design documentation.
3 Power Supply
After completing the device (processor) selection and system block diagram, next step in the design process is
to determine the power supply architecture for the selected processor.
3.1 Power Supply Architecture
The power supply architecture that can be considered are listed below:
3.1.1 Integrated Power Architecture
The power architecture could be based on
For more information, see the
3.1.2 Discrete Power Architecture
The power architecture could be based on
3.2 Power (Supply) Rails
For the complete list of processor power supply rails and recommended operating range, see the Recommended
Operating Conditions section in the Specifications chapter of the device-specific data sheet. The following
sections provide additional details about select power rails.
4
Hardware Design Guide for AM62A7/AM62A3 Devices
Note
SysConfig-PinMux Tool
Note
Multi-channel ICs (PMIC)
Starter Kit SK-AM62A-LP EVM
DC-DC converters
Copyright © 2023 Texas Instruments Incorporated
that helps a board designer select the appropriate
such as TPS6593-Q1.
schematic.
and LDOs.
www.ti.com
SPRAD85 – MARCH 2023
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