AM6442: keywriter: Driving VPP from GPIO directly without LDO

Hello Raimar

Could you share the status of the customer board design - in design or board is build and being tested.

If the board has been built and tested, did you attempt to program the eFuse?

Regards,

Sreenivasa

Hello Sreenivasa,

Thank you for your insights. We have decided to proceed with a redesign and will adhere more closely to the recommended schematics, particularly regarding the LDO.

Best regards,
Raimar

Hello Raimar

Thank you.

In the current version, you should be able to apply external supply for programming the eFuse in case you are able to isolate the IO connected to the VPP pin.

Please ensure the power sequencing is followed in case you consider connecting external VPP supply and test the eFuse programming.

Regards,

Sreenivasa

Hello Raimar

Raimar Sandner said:

Thank you for your insights. We have decided to proceed with a redesign and will adhere more closely to the recommended schematics, particularly regarding the LDO.

Once the schematic design is complete, i would suggest doing a self-review of the schematics using the below collaterals.

After the self-review you could request TI to support a quick review through the TI field team you are working and this is optional in case you have done the self review.

Recommended References for review and design of custom board
AM64x
Data sheet
www.ti.com/.../sprsp56
AM64x Sitara Processors datasheet (Rev. G)
Hardware Design Guide
www.ti.com/.../sprad67
DDR Board Design and Layout Guidelines
www.ti.com/.../spracu1
DDR Board Design and Layout Guidelines
www.ti.com/.../sprad06
Schematic Design and Review Checklist for AM64x
www.ti.com/.../spracu5

PRU-ICSSG
www.ti.com/.../sprac90g.pdf

AM64x Schematic checklist
e2e.ti.com/.../faq-am625-am623-am62a-am62p-am62d-q1-am64x-am243x-design-recommendations-custom-board-hardware-design---schematics-review-checklists

AM64x Schematic self-review
e2e.ti.com/.../faq-am6442-am6441-am6422-am6421-am6412-am6411-am243x-design-recommendations-custom-board-hardware-design---custom-board-schematics-self-review
e2e.ti.com/.../faq-am625-am623-am62a-design-recommendations-commonly-observed-errors-during-custom-board-hardware-design-sk-schematics-updates-for-design-update-note
e2e.ti.com/.../faq-am625-am625-am623-am62a-am62p-am62d-q1-am64x-am243x-design-recommendations-custom-board-hardware-design---list-of-errors-observed-during-customer-schematics-review
e2e.ti.com/.../faq-am625-am623-am62a-am62p-am62d-q1-am64x-am243x-design-recommendations-custom-board-hardware-design---queries-related-to-soc-data-sheet-pin-attributes

Frequently Asked Questions FAQs
e2e.ti.com/.../faq-custom-board-hardware-design---master-complete-list-of-faqs-for-all-sitara-processor-am62x-am64x-am243x-am335x-families
e2e.ti.com/.../faq-am6442-am6441-am6422-am6421-am6412-am6411-custom-board-hardware-design---faqs-related-to-processor-collaterals-functioning-peripherals-interface-and-evm-starter-kit
e2e.ti.com/.../faq-am6442-am6441-am6422-am6421-am6412-am6411-custom-board-hardware-design---design-and-review-notes-for-reuse-of-tmds64evm-schematics
e2e.ti.com/.../faq-am6442-am6441-am6422-am6421-am6412-am6411-custom-board-hardware-design---design-and-review-notes-for-reuse-of-sk-am64b-schematics
e2e.ti.com/.../faq-am62x-am64x-custom-board-hardware-design-how-to-handle-used-unused-pins-peripherals-e-g-gpios-serdes-usb-csi-mmc-emmc-sd-card-csi-oldi-dsi

Downloadable design files on TI.com list for SK/EVM
TMDS64EVM Design Package Folder and Files List
www.ti.com/.../sprt782
SK-AM64B Design Package Folder and Files List
https://www.ti.com/lit/pdf/sprt783

Regards,

Sreenivasa