[FAQ] AM625 / AM623 / AM620-Q1 / AM62Ax / AM62Px / AM62D-Q1 / AM62L / AM64x / AM243x (ALV) / AM335x Design Recommendations / Custom board hardware design - Schematics review checklists

Kallikuppa Sreenivasa

Guru**** 190459 points

Part Number: AM625
Other Parts Discussed in Thread: AM62D-Q1, AM62L

Tool/software:

Hi Board designers

The AM64x, AM62x, AM62Ax, AM62D-Q1, AM62Px and AM62L custom board Schematic review Checklist application note provides a supplemental design check
when creating designs with AM64x, AM62x, AM62Ax, AM62D-Q1, AM62Px and AM62L family of processors. Schematic review Checklist enables customers to
perform self-review of all the sections (critical aspects) of their custom board design as well as track which sections of the
custom board schematic have been reviewed and sections that might need additional attention or clarifications.
This FAQ provides detailed description on how to use the spreadsheet and address some of the common questions/issues that can arise
during custom board schematic design. The FAQ and the schematic review checklist is a companion to the other processor documentation
(Data sheet, Technical Reference Manual, Errata, Application notes and so forth) and does not replace it or any documentation.
If there are any discrepancies between this schematic review checklist and processor documentation, the processor documentation
take precedent (unless otherwise noted).

When reviewing a custom board schematic design, often the review Checklist will refer you to processor specific EVM or SK design(s).
In case of any discrepancy between TI EVM or SK and the device-specific data sheet, or other documentation, always follow the processor
documentation (unless otherwise noted). Despite the designer's best efforts, the EVM/SK may contain errors that still function but
are not completely aligned with the data sheet specification. The EVM/SK designs are a great place for design information,
but should not be considered as reference designs to be blindly reused.

Schematic Design Guidelines
The user's guide provides schematic design guidelines that can be used during custom board schematic design
phase to implement the circuit connections between the processor and peripherals supported by the selected
processor. Links to relevant FAQs have been added (as part of the guideline in each section) in addition to the
design guidelines. FAQs (links added) provide additional information on a specific peripheral or interface topic
including description and details on the implementation/use case and learning from customer interactions.
The recommendation is for custom board designers to follow the schematic design guidelines to minimize design
errors that can affect board functionality, performance and to optimize the custom board design/build/test efforts

Schematic Review Checklist
Schematic review checklist that can be used by custom board designers to review the custom board schematic
covering specific peripheral(s) has been added at the end of each section, sub section of the user's guide.
The general recommendations, processor power and processor peripherals sections, sub sections described in
the user's guide includes the checklist at the end. The schematic review checklist is categorized as General,
Schematic Review, and Additional. Custom board designers can use the schematic review checklist to perform
self-review of the custom board schematic design. Self-review minimizes possible schematics errors that can
result in functional or performance related concerns and also reduced the reviewers efforts during formal reviews
(internal or external). Schematics review(s) minimize(s) the efforts required during custom board bring-up or
performance testing resulting in increased board design quality and adherence to the planned timeline.

The key features of the Schematic Review Checklist are listed in this section. The Schematic Review Checklist covers wide range
of topics regarding custom board schematic design. The list has been made comprehensive for customer to use. However, the list is not exhaustive,
and other items might need to be verified in your custom board design.
If you have specific questions about this Schematic Review Checklist or aspects of a design not covered by this Schematic Review Checklist, submit
a ticket on the TI E2E support forums.

Topics covered in the Schematic Review Checklist includes:

Processor Selection
Power Architecture
General Recommendations including Component Selection and guidelines to be followed Before Beginning the Design and SK/EVM design reuse
Processor-Specific checklist for Processor Core and Peripheral Core supplies, Peripheral Analog supplies and IO group supplies
Processor-Specific checklist for eFuse VPP supply, partial IO mode configuration and Capacitors for Supply Rails
Processor-Specific checklist for Clock (clock input, clock output) and Reset (reset input and reset output)
Processor-Specific checklist for Configuration of Boot Modes (for Processor) and Board Debug Using JTAG and EMU
Processor-Specific checklist for Supply Connections for IO Groups
Checklist for memory Interface (DDRSS (DDR4 / LPDDR4), MMCSD (eMMC / SD / SDIO), OSPI / QSPI and GPMC)
Checklist for external Communication Interface (Ethernet (CPSW3G), USB2.0, PRUSS, UART and Controller Area Network (CAN))
Checklist for on-board Synchronous Communication Interface (MCSPI, MCASP and I2C)
Checklist for user Interface (CSIRX0, DPI, OLDI, DSI), GPIO and Hardware Diagnostics
Checklist for general Board Bring-up and Debug

Refer below schematic review checklists for Sitara family of processors

Note:

The schematic review checklist has 3 sections

General:

The general section lists (summarizes) the circuit implementations in bullets that are required (expected) to
support the functionality for the peripheral section described above the checklist section (design guidelines
section). The section also include care abouts to be considered when the section is interfaced or connected
to another section to implement the required peripheral or module functionality (may not require (need) circuit
implementation). The recommendation is to review and close the list of implementation checks provided before
continuing with the schematic review.

Schematic Review:

The schematic review section lists (summarizes) the circuit implementations in bullets that are required
(expected) to be added by the custom board designers for the circuit section to support the functionality including
the values, connections and other implementations to be followed for implementing the peripheral or module.
The recommendation is to compare for the custom board schematic design implementation with the schematic
checklist to make sure the implementation follows the design guidelines before the start of the layout.

Additional:

The additional section lists (details) the implementation and use case description in bullets that can be used
by custom board designers along with the schematic review section to understand the circuit implementation
rationale (need to implement) before considering optimizing the circuit design.

Schematic Review Checklist for AM62L processor family (Recommended)

PDF

https://www.ti.com/lit/pdf/sprado8

Excel

TBD

Schematic Review Checklist for AM62Px processor family (Recommended)

PDF

https://www.ti.com/lit/pdf/spradn4

Excel

2045.Schematic Design Guidelines, Review checklist_AM62P_Processor_Family_31122024.xlsx

Schematic Review Checklist for AM62Ax, AM62D-Q1 processor family (Recommended)

PDF