On Tue, Feb 7, 2017 at 1:49 AM, Hoan Tran <hot...@apm.com> wrote: >> I wonder what is at addresses 0x08, 0x14, 0x20, 0x2c, 0x44? > > They are unused registers. > - 0x8, 0x14, 0x20, 0x2c are port data source registers. > - 0x44 is the raw interrupt status register. > >> Anything interesting we should know about? I bet they are not just >> dead address space.
Sometimes they are (for example Synopsys DW DMA has few holes in address space). >> Is there a public datasheet for this thing that I can look at? > > I don't know if they public this datasheet. You can register and > download from here > https://www.synopsys.com/dw/ipdir.php?c=DW_apb_gpio Intel Quark x1000 SoC specification, which is public, at least sheds a light on 0x44 (from above list). It has description of other used registers (regarding to only one portA). http://www.intel.me/content/www/xr/ar/embedded/products/quark/quark-x1000-datasheet.html -- With Best Regards, Andy Shevchenko
