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9 Device Connection and Layout Fundamentals

9.1 Power Supply Decoupling and Bulk Capacitors

9.1.1 Power Distribution Network Implementation Guidance

The Powering Jacinto™ J7 SoC Family For Isolated Power Groups With TPS6594133A-Q1 PMIC and Dual

HCPS Converters User's Guide provides guidance for successful implementation of the power distribution

network. This includes PCB stackup guidance as well as guidance for optimizing the selection and placement

of the decoupling capacitors. TI supports only designs that follow the board design guidelines contained in the

application report.

9.2 External Oscillator

For more information about External Oscillators, see Clock Specifications.

9.3 JTAG and EMU

Texas Instruments supports a variety of eXtended Development System (XDS) JTAG controllers with various

debug capabilities beyond only JTAG support. A summary of this information is available in the XDS Target

Connection Guide.

For more recommendations on EMU routing, see Emulation and Trace Headers Technical Reference Manual

9.4 Reset

The device incorporates four external reset pins (MCU_PORz, MCU_RESETz, PORz, and RESET_REQz) and

two reset status pins (MCU_RESETSTATz and RESETSTATz). These pins can be driven by an external power

good circuitry or Power Management IC (PMIC). MCU_PORz and Main PORz pins should be held active low

during the entire power-up phase, and until all power supplies as well as the HFOSC0 clock are stable.

All MCU domain resets act as master resets to the whole device, whereas Main domain resets only reset Main

domain (MCU domain is reset isolated from all Main domain resets).

9.5 Unused Pins

For more information about Unused Pins, see Pin Connectivity Requirements.

9.6 Hardware Design Guide for JacintoTM 7 Devices

The Hardware Design Guide for JacintoTM 7 Devices document describes hardware system design

considerations for the JacintoTM 7 family of processors.This design guide is intended to be used as an aid

during the development of application hardware.

AM69A, AM69

SPRSP92C – FEBRUARY 2023 – REVISED JUNE 2024

www.ti.com

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AM69 Datasheet(PDF) 290 Page - Texas Instruments