Do we have any idea what exactly they do to update the firmware internally?
The wiki says once coreboot is flashed you can flash it internally. I suppose this means the blockade protecting the flash can be switched of somehow, as the vendor's have to do it to install firmware-updates. Am 05.08.2017 um 21:12 schrieb Igor Skochinsky via coreboot: > Hello Philipp, > > Saturday, August 5, 2017, 8:41:42 PM, you wrote: > > PS> Yes, you're probably right. > > PS> Though I wonder when and how they programmed the firmware. Before or > PS> after soldering? > > Most likely before, unless they have some debug header exposed. From > : > >> When the hardware and software nears production readiness, it is >> common practice to preprogram flash memory devices prior to >> starting high-volume PCB manufacturing flows for two principal >> reasons. First, firmware loaded onto the device can be used to >> perform basic booting and testing of the PCB during manufacturing >> to check system/module functionality. Second, loading the final >> firmware, operating system (OS), and application code on the flash >> device prior to manufacturing maintains a high-volume >> manufacturing beat rate. To support these usage models, multiple >> vendors provide systems for loading firmware and data into flash >> memory devices prior to the PCB solder flow process. > Modern flash chips don't have issues retaining programmed bits during reflow > soldering as long as the correct temperature profile is observed . > > : > http://www.electronicdesign.com/memory/understanding-onboard-flash-programming > : http://dataioinfo.com/LiveImages/26/20/DocumentURL.pdf > > > -- coreboot mailing list: email@example.com https://mail.coreboot.org/mailman/listinfo/coreboot