Microsoft, seeking to break into the market for tablet computers, will update its Surface RT using chips from Qualcomm, people with knowledge of the company’s plans said. Some new versions of Surface will be based on Qualcomm’s Snapdragon processors, which can deliver fast wireless data connections, said the people, who asked not to be identified because Microsoft has yet to announce new models. Nvidia , whose Tegra chip is used in the current Surface RT, will continue as a supplier for some versions, one person said. By adding Qualcomm, the largest supplier of chips for smartphones, Microsoft will be able to expand the capabilities of Surface. Sales of the device, designed and sold by Microsoft, have fallen short of analysts’ estimates, leaving the tablet’s Windows RT operating system with less than a percentage point of market share in the first quarter, compared with 40 percent for Apple Inc., according to IDC.