CC1310: CC1310

Deepak Gauba

Part Number: CC1310

Hi,

What is the status of AES Key Store RAM in the standby power mode. Is this key store RAM is preserved or it losses its contents?

Regards,

Deepak

over 2 years ago

0 YiKai Chen over 2 years ago

Guru 735685 points

Standby mode has Ram retention which you can refer to www.ti.com/.../cc1310.pdf

0 Deepak Gauba over 2 years ago in reply to YiKai Chen

Prodigy 30 points

Thanks YiKai,

The document talks about SRAM retention which can be selected out of 4KB or 6KB blocks. I could not find any information on the AES Key Store RAM (write only) retention, which can hold 8 keys before loading to AES HW engine.

Regards,

Deepak

0 Sid over 2 years ago in reply to Deepak Gauba

TI__Mastermind 20412 points

Hi Deepak,

From Section 10.3 of the Technical Reference Manual, the Crypto module's registers have no retention unless the module is enabled in the low power modes.

Also, if you look at the register description of the KEYWRITTENAREA register, you will see that the Key Store RAM area needs to be rewritten on a reset whenever this register is invalid.

So, to use the keys stored that is in the Key store RAM, you need to have the module enabled in the low power modes.

Regards,

Sid

Sub-1 GHz

Sub-1 GHz forum

CC1310: CC1310