Texas Instruments AM625 User Manual

Hardware design considerations for custom board using family of processors

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User's Guide

Hardware Design Considerations for Custom Board

Using AM625 / AM623 / AM625SIP / AM625-Q1 / AM620-Q1

Family of Processors

This Hardware Design Considerations for Custom Board document gives an overview of the design

considerations to be followed by the board designers while designing custom boards using any of the AM625,

AM623, AM625SIP, AM625-Q1 and AM620-Q1 family of processors. This document is intended to be used as a

guideline at different stages of custom board design by board designers.

Additionally, links are provided for processor product page, related collaterals, E2E FAQs and other commonly

referenced documents that could help the board designers optimize the design efforts and schedule during

custom board design.

Introduction.............................................................................................................................................................................2

1.1 Before Getting Started With the Custom Board Design.....................................................................................................

1.2 Processor Selection...........................................................................................................................................................

1.3 Technical Documentation...................................................................................................................................................

1.4 Design

Documentation.......................................................................................................................................................5

2 Block

Diagram.........................................................................................................................................................................6

2.1 Constructing the Block

2.2 Configuring the Boot Mode................................................................................................................................................

2.3 Confirming PinMux (PinMux Configuration).......................................................................................................................

3 Power Supply..........................................................................................................................................................................

3.1 Power Supply

Architecture.................................................................................................................................................8

3.2 Power (Supply)

Rails..........................................................................................................................................................8

3.3 Determining Board Power

3.4 Power Supply Filters........................................................................................................................................................

3.5 Power Supply Decoupling and Bulk

3.6 Power Supply Sequencing...............................................................................................................................................

3.7 Supply Diagnostics...........................................................................................................................................................

3.8 Power Supply

Monitoring..................................................................................................................................................11

Clocking.................................................................................................................................................................................12

4.1 Processor External Clock Source....................................................................................................................................

4.2 Processor Clock Outputs.................................................................................................................................................

5 JTAG (Joint Test Action Group)..........................................................................................................................................

5.1 JTAG / Emulation.............................................................................................................................................................

6 Configuration (Processor) and Initialization (Processor and Device).............................................................................

6.1 Processor

Reset...............................................................................................................................................................14

6.2 Latching of Boot Mode

6.3 Resetting the Attached Devices.......................................................................................................................................

6.4 Watchdog Timer...............................................................................................................................................................

7 Processor

Peripherals..........................................................................................................................................................16

7.1 Selecting Peripherals Across Domains............................................................................................................................

7.2 Memory (DDRSS)............................................................................................................................................................

7.3 Media and Data Storage Interfaces.................................................................................................................................

7.4 Common Platform Ethernet Switch 3-port Gigabit (CPSW3G - for Ethernet Interface)...................................................

7.5 Programmable Real-Time Unit Subsystem (PRUSS)......................................................................................................

7.6 Universal Serial Bus (USB) Subsystem...........................................................................................................................

SPRAD05C – MAY 2023 – REVISED AUGUST 2024

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ABSTRACT

Table of Contents

Diagram.........................................................................................................................................6

Requirements.........................................................................................................................10

Capacitors...............................................................................................................10

Configuration...............................................................................................................................14

Hardware Design Considerations for Custom Board Using AM625 / AM623 /

AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors

Table of Contents

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Summary of Contents for Texas Instruments AM625

Page 1 This Hardware Design Considerations for Custom Board document gives an overview of the design considerations to be followed by the board designers while designing custom boards using any of the AM625, AM623, AM625SIP, AM625-Q1 and AM620-Q1 family of processors. This document is intended to be used as a guideline at different stages of custom board design by board designers.
Page 2 All trademarks are the property of their respective owners. 1 Introduction The Hardware Design Considerations for Custom Board Using AM625, AM623, AM625SIP, AM625-Q1 and AM620-Q1 Family of Processors user's guide (document) provides a starting point for the board designers designing with any of these processors. This document provides an overview of the recommended design flow at different board design stages and highlights important design requirements that must be addressed.
Page 3 (AM625SIP – AM6254 Sitara™ Processor with Integrated LPDDR4 SDRAM). Using AM625SIP as a drop-in replacement on an existing AM625 board is NOT recommended. Design changes are required to be made before using the AM625SIP on an AM625 board.
Page 4 SK-AM62B Design Package Folder and Files List Refer below FAQs that includes the PDF schematics and additional information related to starter kits: [FAQ] AM625 / AM623 Custom board hardware design - Design and Review notes for Reuse of SK-AM62B-P1 Schematics...
Page 5 AM243x, AM335x) families To make it easy for customers to use, we also listed the FAQs processor family wise. [FAQ] AM625, AM623, AM625SIP, AM625-Q1, AM620-Q1 Custom board hardware design - FAQs related to Processor collateral, functioning, peripherals, interface and Starter kit Note The FAQs are being updated frequently.
Page 6 Some boot mode pins functionalities are reserved. Any boot mode pins marked as Reserved or not must not be left floating. It is recommended to pull the input high or low using a resistor. For details regarding Hardware Design Considerations for Custom Board Using AM625 / AM623 / SPRAD05C – MAY 2023 – REVISED AUGUST 2024...
Page 7 [FAQ] AM625 / AM623 / AM644x / AM243x / AM62A / AM62P - Bootmode implementation without buffers. This is a generic FAQ and can also be used for the AM625SIP / AM625-Q1 / AM620-Q1 family of processors. 2.3 Confirming PinMux (PinMux Configuration) The processor supports a number of peripheral interfaces.
Page 8 For more information, refer to the Recommended Operating Conditions section in the Specifications chapter of the device-specific data sheet. 3.2.3 DDR PHY and SDRAM Power Supply Hardware Design Considerations for Custom Board Using AM625 / AM623 / SPRAD05C – MAY 2023 – REVISED AUGUST 2024 AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors Submit Document Feedback Copyright ©...
Page 9 IO that is not powered. This is needed to protect the IOs of processor and attached devices. For more information, see the [FAQ] AM625 / AM623 Custom board hardware design – Power sequencing between SOC (Processor) and the Attached devices (Fail-safe). This is a generic FAQ and can also be used for AM625SIP / AM625-Q1 / AM620-Q1 family of processors.
Page 10 It is recommended to disable the VPP supply (left floating (HiZ) or grounded) when not programming the OTP eFuses. For more information, see the [FAQ] AM625 / AM623 / AM625SIP / AM625-Q1 / AM620-Q1 Custom board hardware design – Queries regarding VPP eFuse programming power supply selection and application.
Page 11 (Power-Up and Power-Down) diagram and verify the sequence with the device-specific data sheet. SPRAD05C – MAY 2023 – REVISED AUGUST 2024 Hardware Design Considerations for Custom Board Using AM625 / AM623 / Submit Document Feedback AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors...
Page 12 32.768kHz crystal as clock source. For more information, see the [FAQ] AM625: LFOSC usage in the device. This is a generic FAQ and can also be used for AM623 / AM625SIP / AM625-Q1 / AM620-Q1 family of processors.
Page 13 JTAG interface signals using test points for development testing and the required pulls as per the Pin Connectivity Requirements section of the device-specific data sheet. SPRAD05C – MAY 2023 – REVISED AUGUST 2024 Hardware Design Considerations for Custom Board Using AM625 / AM623 / Submit Document Feedback AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors...
Page 14 The choice of reset status output is application dependent. Ensure the attached device reset inputs are pulled as per the device recommendations. Hardware Design Considerations for Custom Board Using AM625 / AM623 / SPRAD05C – MAY 2023 – REVISED AUGUST 2024...
Page 15 Use of watchdog timer is based on the application requirement. Consider using internal or external watchdog timer. SPRAD05C – MAY 2023 – REVISED AUGUST 2024 Hardware Design Considerations for Custom Board Using AM625 / AM623 / Submit Document Feedback AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors...
Page 16 1 X 8-bit memory configuration is not a valid configuration. Based on the application requirements, same memory (LPDDR4) device can be used with the AM625 / AM623 / AM625-Q1 / AM620-Q1 , AM62A7 / AM62A3 and AM62P / AM62P-Q1 processors due to the availability of 1 X 16-bit configuration.
Page 17 [FAQ] AM625 / AM623 / AM62A / AM62P Design Recommendations / Commonly Observed Errors during Custom board hardware design – eMMC MEMORY Interface. This is a generic FAQ and can also be used for AM625SIP / AM625-Q1 / AM620-Q1 family of processors.
Page 18 Encoder Pulse (EQEP), ECAP, MCAN (Modular Controller Area Network) with Full CAN-FD support and GPIO modules. Hardware Design Considerations for Custom Board Using AM625 / AM623 / SPRAD05C – MAY 2023 – REVISED AUGUST 2024 AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors Submit Document Feedback Copyright ©...
Page 19 [FAQ] AM62A7-Q1: Internal pull configuration registers for MCU_I2C0 and WKUP_I2C0. This is a generic FAQ and can also be used for AM625 / AM623 / AM625SIP / AM625-Q1 / AM620-Q1 family of processors. The number of peripheral instances available depends on the processor selection. The required interfaces can be configured using the SysConfig-PinMux tool based on the application.
Page 20 AM62P Design Recommendations / Commonly Observed Errors during Custom board hardware design – SOC Unused peripherals and IOs. This is a generic FAQ and can also be used for AM625SIP / AM625-Q1 / AM620- Q1 family of processors. 7.10.1 AM625 / AM623 / AM625-Q1 / AM620-Q1 For information on connecting the unused processor peripherals (USB0..1, DDRSS0, CSIRX0 and OLDI0) and...
Page 21 Reach out to TI using to check on the availability. SPRAD05C – MAY 2023 – REVISED AUGUST 2024 Hardware Design Considerations for Custom Board Using AM625 / AM623 / Submit Document Feedback AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors...
Page 22 The link below summarizes the considerations board designers are required to be familiar when reusing TI SK design files. [FAQ] AM625 / AM623 / AM625SIP / AM625-Q1 / AM620-Q1 Custom board hardware design - Reusing TI SK (EVM) design files.
Page 23 Note External DDR interface is not supported. SPRAD05C – MAY 2023 – REVISED AUGUST 2024 Hardware Design Considerations for Custom Board Using AM625 / AM623 / Submit Document Feedback AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors Copyright © 2024 Texas Instruments Incorporated...
Page 24 LPDDR4 memory interface, refer the LPDDR4 Board Design Simulations chapter of the AM62Ax / AM62Px LPDDR4 Board Design and Layout Guidelines Hardware Design Considerations for Custom Board Using AM625 / AM623 / SPRAD05C – MAY 2023 – REVISED AUGUST 2024 AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors Submit Document Feedback Copyright ©...
Page 25 Optimization of Custom board hardware design [FAQ] Board bring up tips for Sitara devices (AM64x, AM243x, AM62x, AM62Ax, AM62Px) [FAQ] AM625 / AM623 / AM62A Design Recommendations / Commonly Observed Errors during Custom board hardware design – SK Schematics Design Update Note...
Page 26 • Texas Instruments: Display Interfaces: A Comprehensive Guide to Sitara MPU Visualization Designs Hardware Design Considerations for Custom Board Using AM625 / AM623 / SPRAD05C – MAY 2023 – REVISED AUGUST 2024 AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors Submit Document Feedback Copyright ©...
Page 27 Reduced Media Independent Interface Secure Digital SPRAD05C – MAY 2023 – REVISED AUGUST 2024 Hardware Design Considerations for Custom Board Using AM625 / AM623 / Submit Document Feedback AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors Copyright © 2024 Texas Instruments Incorporated...
Page 28 Via Channel Array WKUP Wakeup eXtended Development System Hardware Design Considerations for Custom Board Using AM625 / AM623 / SPRAD05C – MAY 2023 – REVISED AUGUST 2024 AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
Page 29 • Added Guidelines and Board Bring-up Tips ....................SPRAD05C – MAY 2023 – REVISED AUGUST 2024 Hardware Design Considerations for Custom Board Using AM625 / AM623 / Submit Document Feedback AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors Copyright © 2024 Texas Instruments Incorporated...
Page 30 Updated Common for all AM62x family of processors ..................• Updated Terminology ............................27 Hardware Design Considerations for Custom Board Using AM625 / AM623 / SPRAD05C – MAY 2023 – REVISED AUGUST 2024 AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors Submit Document Feedback...
Page 31 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
Page 32 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
Page 33 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
Page 34 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
Page 35 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2023, Texas Instruments Incorporated...
Page 36 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2024, Texas Instruments Incorporated...

This manual is also suitable for:

Am623 Am625sip Am625-q1 Am620-q1