TI AM261x

The TI AM261x are Arm Cortex-R5F-based MCUs with up to 2 cores for real-time control, safety and security applications.

Flash Banks

Flash Bank	Base address	J-Link Support	Loader
			Name	Size
QSPI Flash	0x60000000		Default	128 MB

ECC RAM

• If the DevBoot mode is selected, TCMA RAM will be initialized for correct ECC operation during the connect phase.

Watchdog Handling

• The device has two watchdogs: WWDT0 and WWDT1: one for each core.
• During flash programming the only WWDT0(core 0) is fed, as the core should not access the watchdog of another core.

Multi-Core Support

Before proceeding with this article, please check out the generic article regarding Multi-Core debugging here.
The AM261x family comes with a variety of multi-core options.
Some devices from this family feature a secondary core which function as a diagnostic core(Lockstep mode) by default.
When connecting to a secondary core, it will be switched to the Dual-core mode.

Core	J-Link Support
Arm Cortex-R5F_0
Arm Cortex-R5F_1

In below, the debug related multi-core behavior of the J-Link is described for each core:

Main core

Init/Setup

• Initializes the ECC TCMA RAM only in DevBoot mode.

Reset

• In multi-core based setups, reset of the secondary cores is usually very use case specific (e.g. reset selected core only; reset other cores / peripherals as well). The standard reset strategy for Cortex-A/R is based on a pin reset which would mess up the entire debug session. For that reason, the J-Link SW does not perform anything on reset. If a device specific reset handling is required, it needs to be implemented using a J-Link script file.

Attach

• Attach is not supported when the device is in the DevBoot mode and TCMA RAM is used(ECC initialization is performed).

Secondary core(s)

Init/Setup

• Initializes the ECC TCMA RAM only in DevBoot mode.
• Disables Lockstep mode.

Reset

• No reset is performed.

Attach

• Attach is not supported when the device is in the DevBoot mode and TCMA RAM is used(ECC initialization is performed).

Device Specific Handling

Reset

• The device reset is not performed, as it requires multi-core and boot-loader handling.

Evaluation Boards

• TI AM261x SOM

Example Application

• TI AM261x SOM