The PD16663 is a column (segment) driver device with built-in RAM. It is capable of driving a full-dot LCD. There are 240 outputs that, with the 240 x 160 x 4-bit built-in display RAM, enable a 16-gray scale display. The sixteen gray scales can be selected arbitrarily from a 49-stage palette. When combined with the PD16667, this device can drive displays of 240 x 160 to 480 x 320 dots.