Using the FRAM on the BC66 module

oscargomezf · September 8, 2020, 11:20am

Hi everyone,

I am using the FRAM on the BC66 module in order to store a few bytes and twice a day, but right now I need to store a few bytes but around 500 times per day.

Does anyone know how many times can I write in that FRAM without degradation?

Best regards.

WizIO · September 8, 2020, 11:29am

You can use 512 MAX bytes of SoC SRAM

github.com

Wiz-IO/framework-quectel/blob/master/opencpu/bc66/SDK15/cpp_bc66.ld#L5


MEMORY
{
	ROM (rx) :  ORIGIN = 0x08292040, LENGTH = 0x00032000
	RAM (rwx) : ORIGIN = 0x001E7000, LENGTH = 0x00019000	
	RETSRAM (rwx) : ORIGIN = 0x4301F00, LENGTH = 256
}

SECTIONS
{
    . = 0x08292040;
	.initdata :
	{ 
	. = ALIGN(4);
		KEEP(*(.initdata));
	}AT > ROM

oscargomezf · September 8, 2020, 3:04pm

I was talking to Quectel and it seems to be they have a mechanism deployed with wear levelling and it is allowed to write until 100k cycles.

Abner-Q · October 12, 2020, 3:41am

Hi Oscargomezf
TCP can reach 10K under extreme conditions, and UDP under extreme conditions = value of sent data*20
Currently TCP data_len=512
UDP data_len=2018