UTC Not necessarily I believe SD 2 0 has tighter electrical specifications than SD 1 x such as lower voltage tolerances and higher current tolerances so a SD 1 x device may but would not necessarily qualify as an SD 2 0 device It would need to be meet the electrical specs of SD 2 0 before it could be able to offically support SDHC and carry the SDHC logo It is possible that some SD 1 x devices will already meet this spec just because they were designed well from the start but they would need to be tested to ensure they meet the SD 2 0 electrical spec and also have a firmware upgrade 136 186 1 185 04 08 1 July 2008