A leg support system for transferring weight support from the ankle region of a leg to the upper portion of the calf just below the knee includes a weight-bearing support cuff and a pair of support members each having a foot portion positioned even or slightly lower than the natural position of the foot of the user. A viscosity of the photo decomposition type polyimide acid is not more than 35 mPa\xb7s. The selected first side gear may have a different number of teeth than a selected second side gear. In this manner, a large amount of data can be processed at high speed regardless of the contents of operation or data bit width. Drive state of 1st and 2nd switches are controlled by a control signal. An interconnect couples the solar cell contact to the diode contact.