MB1791 Bill of materials

[KKan.1]

Hi Sir. Madam,

For MB1791 Development Broad, there are 3 Type of ​design:

1. MB1791-HighBand_HighPower
2. MB1791-HighBand_LowPower
3. MB1791-LowBand_HighPower

But I doubt the BOM given, the part Description, Value and Manufacture Part Number are not tally for the Location: C8, C9, C26, C31:.

Pls advise the correct value for ​MB1791-HighBand_HighPower.

Thanks.

[Sarra.S]

Hello @KKan.1​ and welcome to ST Community

Thank you for bringing this to our attention!

I reported the issue internally.

Internal ticket number: 149284  (This is an internal tracking number and is not accessible or usable by customers)

Sarra

[Sarra.S]

Hello again @KKan.1​,

As mentioned earlier, documents will be updated soon with the right values, but I can inform you that the recommended value of C8, C9, C26, C31 is 6.8pF as it is mentioned in the board schematics:

Hope that helps!

[KKan.1]

Hi Sara,

Thanks for feedback.

For my understanding, Schematic is general for the 3 different Band & Power reference.

BOMs is the actual that we need to follow :

1. BOM_MB1791-HighBand_HighPower
2. BOM_MB1791-HighBand_LowPower
3. BOM_MB1791-LowBand_HighPower

--> STM32WL55CC - Sub-GHz Wireless Microcontrollers. Dual-core Arm Cortex-M4/M0+ @48 MHz with 256 Kbytes of Flash memory, 64 Kbytes of SRAM. LoRa, (G)FSK, (G)MSK, BPSK modulations. AES 256-bit. Multiprotocol System-on-Chip. - STMicroelectronics

 

Pls advise.

[Sarra.S]

Hello again @KKan.1​ 

>> BOMs is the actual that we need to follow

Indeed, the BOM will be updated with the correct value 6.8pF, so you can safely use it before the update!

Hope that's clear!

[Sarra.S · Accepted solution]

Hello @KKan.1, 

Thank you for your input, the updated corrected BOM is on-line:

 STM32WL55CC - Sub-GHz Wireless Microcontrollers. Dual-core Arm Cortex-M4/M0+ @48 MHz with 256 Kbytes of Flash memory, 64 Kbytes of SRAM. LoRa, (G)FSK, (G)MSK, BPSK modulations. AES 256-bit. Multiprotocol System-on-Chip. - STMicroelectronics