Hi Board designers,
The below links are a quick reference to the collaterals that can be referred when starting a custom design.
Device Selection and features
Product Page
https://www.ti.com/product/AM625-Q1
https://www.ti.com/product/AM620-Q1
Note:
Any AM62x device implemented in the ALW package will be pin2pin compliant to all other AM62x devices implemented in the ALW package.
Datasheet
AM62x Sitara Processors datasheet
https://www.ti.com/lit/pdf/sprsp58
Silicon Errata
AM62x Processor Silicon Revision 1.0
https://www.ti.com/lit/pdf/sprz487
Technical Reference Manual
AM62x Sitara Processors Technical Reference Manual
https://www.ti.com/lit/pdf/spruiv7
Technical Reference Manual W/o registers
Custom Board design:
Hardware Design Considerations
Hardware Design Considerations for Custom Board Using AM625, AM623, AM625SIP, AM625-Q1, AM620-Q1 Family of Processors
https://www.ti.com/lit/pdf/sprad05
Schematic Design and Review Checklist
AM62x Processor Family (Recommended)
AM623, AM625, AM625SIP, AM620-Q1, AM625-Q1 Processor Family Schematic Design Guidelines and Schematic Review Checklist
https://www.ti.com/lit/pdf/sprado3
AM62X processor families (For references)
AM62x, AM62Ax, AM62D-Q1 and AM62Px Processor Families Schematic, Design Guidelines and Review Checklist
https://www.ti.com/lit/pdf/sprad21
Power Consumption
AM62x Maximum Current Ratings
Enabling Low Power Embedded Systems With AM62x Processors
www.ti.com/.../sprad41.pdf
AM62x Power Consumption
www.ti.com/.../spradg1.pdf
https://www.ti.com/lit/pdf/sprada6
AM62x Power Estimation Tool
https://www.ti.com/lit/pdf/sprad31
AM62x Power Consumption
https://www.ti.com/lit/pdf/spradg1
SoC power solutions Application notes:
Discrete Power Solution for AM62x
https://www.ti.com/lit/pdf/sluaak2
Powering the AM62x with the TPS65219 PMIC
https://www.ti.com/lit/pdf/slvafd0
Evaluation - EVM
SK-AM62-LP Design Package Content Overview
www.ti.com/.../SK-AM62-LP
www.ti.com/.../sprt778
Design File Package
https://www.ti.com/lit/zip/sprr471
SK-AM62B-P1 Design Package Content Overview (Rev. A)
www.ti.com/.../SK-AM62B-P1
www.ti.com/.../sprt777
Design File Package
www.ti.com/.../spar001
SysConfig (Pinmux) for SK-AM62-LP
Nand daughter board info for reference
Schematics (Reference) for RMII interface
Note: We did functionally validate the common clock configuration. No other clocking options were tested.
Ethernet PHY daughter card
https://www.ti.com/tool/DP83867-EVM-AM
https://www.ti.com/tool/DP83826-EVM-AM2
https://www.ti.com/tool/TIDA-00928
There seems to be a muxed GPMC interface implemented.
https://media.digikey.com/pdf/Data%20Sheets/Texas%20Instruments%20PDFs/TMDXICE3359_SCH.pdf
CAD symbols
CAD symbol specific to the selected device can be chosen from the device product page. Refer below:
https://www.ti.com/product/AM625-Q1#cad-cae-symbols
https://www.ti.com/product/AM620-Q1#cad-cae-symbols
Ordering & quality
https://www.ti.com/product/AM625-Q1#order-quality
https://www.ti.com/product/AM620-Q1#order-quality
Package pad diameter and substrate pad dimension
AM625-Q1 / AM620-Q1 -> AMC pkg : ball diameter 0.5mm : substrate pad 0.45mm
The recommendation is 1:1 ratio between PCB pad and substrate pad.
Package pad diameter and substrate pad dimension
ALW pkg: ball diameter 0.3mm : substrate pad 0.25mm
The recommendation is 1:1 ratio between PCB pad and substrate pad.
Section and Document reference:
. Width/Spacing Proposal for Escapes
https://www.ti.com/lit/an/sprad13a/sprad13a.pdf
The recommendation is to use 0.25mm (10 mil) BGA landing pads to meet the requirements
Lead finish/Ball material
SnAgCuBi
DDR Board Design and Layout Guidelines
AM62x, AM62Lx DDR Board Design and Layout Guidelines
https://www.ti.com/lit/pdf/sprad06
Escape Routing for PCB Design
AM62x (AMC) Escape Routing for PCB Design
https://www.ti.com/lit/pdf/sprad64
Design Simulation files
https://www.ti.com/product/AM625-Q1#design-tools-simulation
https://www.ti.com/product/AM620-Q1#design-tools-simulation
Simulation files provided includes IBIS, IBIS-AMI, BSDL, Thermal model and power-estimation tool (PET)
AM62x PDN Target impedance values:
Impedance target values for VDD_CORE
Low freq (< 1MHz) : 22mOhm
Mid freq (1 < 20MHz) : 31 mOhm
High freq (20 < 50 MHz) : 40 mOhm
This is valid for either of the core voltages (0.75V, 0.85V) and packages. We do not provide target impedance values for other rails on AM62x.
For frequencies above 50 MHz the board decoupling caps do not play a critical role. SoC and Package decaps (if any) will be dominant beyond 50 MHz
Note:
We do not include Buck output inductance in PDN simulations.
For VDDS_DDR: we do not recommend using target impedance as the signoff for DDR.
Refer to the AM62x, AM62Lx DDR Board Design and Layout Guidelines which outlines all details of power aware SI/PI simulations
that need to be run. The eye mask checks from these power aware simulations are the signoff.
To test PDN analysis SoC and LPDDR4 power line, Customer needs the spec of impedance of SoC/LPDDR4 power line. Could you confirm the impedance?
Here is the plot for the AM62x EVM. However please note that this is an impedance plot of the TI EVM. It should not be used for signoff. The full LPDDR4 system-level simulations must still be run for signoff as prescribed in the LPDDR design guidelines app note.
We only provide impedance targets for VDD_CORE. This information can be found under processor specific section "Example:AM62Ax" (starting on page 31) in the following document: www.ti.com/.../sprac76
As noted in the document, rails not listed are not simulated by TI due to low load transients. For more information, see the device-specific EVM layout for example implementation of these rails.
Other rails like the IOs are highly dependent on external peripherals. From the SoC perspective, if you look at the MAX current ratings for the IOs, the total current (after combining all the IOs of the same voltage) is still very low < 350mA so we don't simulate this rails/No data available.
Regarding your other questions related to PET, the supply names are not expected to match with processor (Example AM62A) pin names because the power estimates in the PET are itemized by supply groups. The power supply consolidation for these supply groups match the EVM.
Power Distribution Networks: Implementation and Analysis
Sitara Processor Power Distribution Networks: Implementation and Analysis
https://www.ti.com/lit/pdf/sprac76
Note: The decoupling capacitor numbers and type on the SK/EVM are only intended to serve as a guideline for customers. The true pass/fail criteria is the target impedance published in the PDN app note.
High Speed Board design and Signal integrity simulation
https://www.ti.com/lit/pdf/spraar7
https://www.ti.com/lit/pdf/spracn9
SYSCONFIG
DDR subsystem register configuration tool
Technical Documents
Collaterals and application notes
https://www.ti.com/product/AM625-Q1#tech-docs
https://www.ti.com/product/AM620-Q1#tech-docs
Technical Support
AM625-Q1 / AM620-Q1 Custom board design - FAQs
Previous E2E threads - Keywords AM625-Q1, AM620-Q1
Starting a new thread
Useful links
Sitara family of processors FAQ master list
Other FAQs
Notes
Regards,
Lavanya M R.
Hi Board designers,
Inputs regarding weight and material content
https://www.ti.com/materialcontent/home
Regards,
Sreenivasa
