RDP Value shown only as a checkbox. Is this normal?

[Grant Bt]

I'm looking at setting the RDP Level to Level 1 for an STM32F103 and I don't see the AA BB CC type stuff like in the current manual. Is this something that STM32CubeProgrammer is doing on purpose for this MCU?  I definitely don't want to enable Level 2 by accident and brick my chip.  Here is a screenshot of what I see:

Is it safe to check this?

[mƎALLEm · Accepted solution]

Hello,

In STM32F10xx (first STM32 series), the flash protection was simple. No RDP levels 0, 1 and 2. Only RDP activated / RDP not activated.

Please refer to PM0075.

So yes you can check it to protect the flash from reading.

[Grant Bt]

Thanks for the reminder to check the data sheet (and doing so on my behalf). The internet is a dogs breakfast. Even here, simply skimming topics can be, um, insufficient.

Introduction

STM32F1 microcontrollers offer three levels of read-out protection: level 0 (no protection), level 1 (Flash memory, backup SRAM, and backup registers protected), and level 2 (same as level 1, but with permanent protection by locking the option bytes). It's important to note that level 2 should only be considered for the final product, not during development stages.

https://community.st.com/t5/stm32-mcus/how-to-change-the-read-out-protection-on-stm32f1/ta-p/49408

[mƎALLEm]

Hello @Grant Bt ,

Thanks for sharing.

I need to check with the knowledge base article owner.

To me STM32F10x has only two levels Level 0: no read protection, Level 1: read out protection enabled. (unless I'm missing something).

Even in the driver (stm32f1xx_hal_flash_ex.h), two levels are available:

/** @defgroup FLASHEx_OB_Read_Protection Option Byte Read Protection
  * @{
  */
#define OB_RDP_LEVEL_0            ((uint8_t)0xA5)
#define OB_RDP_LEVEL_1            ((uint8_t)0x00)

[mƎALLEm]

@Grant Bt 

Contacted the knowledge base article owner and confirmed the issue: No RDP level 2 on STM32F10xx

The article will updated then.

So my answer is valid.

[Grant Bt]

Thank you!

[mƎALLEm]

@Grant Bt 

The article has been updated and mentioned that there is no RDP L2 on STM32F103.

Thank you for your contribution.