Effective Date:

Bulletin Issue Date:

11/24/2020

Description of Change

Silicon Labs announces Virtual Secure Element (VSE) firmware version 1.2.6 for the following module families:

• BGM220P and MGM220P (jointly referred to as xGM220P)

• BGM220S

• BGX220P

• BGX220S

201124946 VSE Firmware v1.2.6 for

xGM220P, BGM220S, BGX220P and

BGX220S Modules

Product Identification

Existing Part #

BGM220PC22HNA2

BGM220PC22HNA2R

BGM220PC22WGA2

BGM220PC22WGA2R

BGM220SC12WGA2

BGM220SC12WGA2R

BGM220SC22HNA2

BGM220SC22HNA2R

BGM220SC22WGA2

BGM220SC22WGA2R

BGX220P22HNA21

BGX220P22HNA21R

BGX220S22HNA21

BGX220S22HNA21R

MGM220PC22HNA2

MGM220PC22HNA2R

This change is considered a minor change which does not affect form, fit, function, quality, or reliability. The information is

being provided as a customer courtesy.

Please contact your local Silicon Labs sales representative with any questions about this notification. A list of Silicon Labs sales

representatives may be found at http://www.silabs.com.

Reason for Change

This is a firmware update to address a vulnerability. Details are covered in Security Advisory - A-00000114 and also in Software

Advisory - A-00000117.

VSE firmware versions 1.2.5 and earlier have the following issues:

1. A device whose VSE firmware has been successfully upgraded at least once can become inoperable if the upgrade file is

removed from flash after the upgrade and the device is subjected to a large cumulative number of resets. The exact number of

reset cycles before failure varies due to process variations and operating temperature but would typically range between 50,000

and 200,000 cycles. It is imperative that this fix be applied to every device to avoid latent failures.

2. In the event of a momentary power failure whose duration is sufficient to cause only a few specific RAM bits to lose state, the

POR boot process can terminate in a hard fault.

VSE v1.2.6 fixes both issues. Silicon Labs manufacturing production is being updated to apply VSE version 1.2.6 starting on the

effective date above.

silabs.com | Building a more connected world.

Bulletin

#2020-11-24-946

User Registration

updates, new product announcements, “how-to” and design documents, product change notices (PCN) and other valuable

content available only to registered users. http://www.silabs.com/profile

Customer Actions Needed:

Modules with VSE firmware version 1.2.5 or earlier should be updated to firmware version 1.2.6. For more information on

identifying the security firmware version of a given device, see AN1222. Firmware updates can be done during the product

manufacturing process or via an over the air update for products in the field. For more information on upgrading the VSE

firmware, see UG266.

silabs.com | Building a more connected world.

Bulletin

#2020-11-24-946