A parking lot with a plurality of parking spaces for vehicles that have OCR-readable license numbers and onboard units with radio IDs that can be read out via radio signals. A tool health monitor includes a library of tool health models, a model selector, and a fault detection and classification unit. The second pixel electrodes are slit in different widths according to a plurality of sub-pixels. Provided is a light emitting element including a base material, a first impurity element, a second impurity element, and a third impurity element. Using the half-speed clock, the transmitter interface supplies data to be transmitted at half the normal rate with respect to a reference clock. The IC further includes a second mixed signal interface block coupled to a second pad in the plurality of pads, where the second mixed signal interface block is adapted to receive and track a first input signal from the circuit external to the IC in a first mode of operation of the IC.