TMS320F28P650DH: Could DCSM locks DRAM (TRM desciprtion not aligned)

Hang Yang

Expert 4156 points

Part Number: TMS320F28P650DH

Hi Experts,

Could DCSM locks DRAM? The description in TRM is confusion.

1 The description only includes LSsRAM

But I can see the DRAM selection in GTABRAM1 register.

In the meantime, it's also cunfsusing that if the DCSM has GRABSECT2

The GRABRAM2 register is shown as "reserved"

3 In the register map, there is a description for GRARAM2

10 months ago

0 Hang Yang 10 months ago

TI__Expert 4156 points

Hi,

Is there any update on this issue?

Regards,

Hang

0 Matt Kukucka 10 months ago in reply to Hang Yang

TI__Mastermind 20380 points

Hi Hang,

Apologies for the delay, Luke is occupied with other activities.

The registers are correct, but the TRM description/diagram you pictured are incorrect. I will file an internal ticket to have this resolved in the next TRM revision.

Please refer to the datasheet's memory map (section 7.3): https://www.ti.com/lit/ds/symlink/tms320f28p659dk-q1.pdf

Rows marked with "Yes" in the Security column are protected by the DCSM. LSx RAM, Dx RAM, and CPU1TOCPU2MSGRAM0/CPU2TOCPU1MSGRAM0 can be protected by the DCSM.

Best,

Matt

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TMS320F28P650DH: Could DCSM locks DRAM (TRM desciprtion not aligned)