Patent ID: 7609405

Claim:
A central processor integrated circuit for a printer controller of a pagewidth inkjet printer, the integrated circuit comprising a bus; host interface circuitry connected to the bus and configured to receive compressed page data having a bi-level black layer and a contone color layer and to communicate the compressed page data to the bus; black layer expansion circuitry connected to the bus and configured to receive and expand the bi-level black layer; color layer expansion circuitry connected to the bus and configured to receive and expand the contone layer; halftoner and compositor circuitry connected to the bus and configured to receive expanded bi-level black layer data and expanded contone layer data and to composite the bi-level black layer over the contone layer; processor circuitry connected to the bus and programmed to control operation of components of the central processor integrated circuit; DMA controller circuitry connected to the bus and configured to be programmed by the processor circuitry to generate addresses for data transfer between the components; and printhead interface circuitry connected to the bus to facilitate communication between the bus and a pagewidth printhead.