Created to support E Ink's Vizplex-enabled electronic paper displays, the Epson S1D13521B is a jointly-developed display controller IC which brings greater functionality with user interface features such as navigation, drop down/popup menus, responsive cursors, and real-time keyboard entry. The device can perform regional updates and enables the display to perform up to 16 tasks in parallel with support for pen input devices. The Broadsheet AM300 prototype kit provides a developpment platform for the controller, and can support 5", 6", 8", and 9.7" active matrix displays.