摘要:
A video controller includes a video block that connects to the print control engine and one laser driver. The video block includes a direct memory access (DMA) block, a video processor, a waveform generator including pattern and multiple pulse mode modulation, a frequency synthesizer, configuration registers, and a data bus. The frequency synthesizer connects to the waveform generator. The configuration registers connect to the DMA block, video processor and the waveform generator. The data bus, operative to carry bus control signals, connects the DMA block, video processor, waveform generator, and the configuration registers.
摘要:
A digital circuit generates very precise varying clock frequencies for applications that can tolerate a small degree of jitter but require exact longer term frequencies, e.g. a video clock for a laser printer. Some subpixel jitter is acceptable, but the overall pixel rate remains exact and consistent. In some applications, the jitter may be desirable to smear the EMI spectrum. For example, if the high frequency input clock is modulated, the edges of the video clock will also be modulated yet remain within the jitter and frequency specification.
摘要:
The invention provides an architecture and method for implementing a programmable I/O interface. The primary function provides a generic reconfigurable interface for serial communications between a laser printer controller and the print mechanism. The design also supports vertical page synchronization (top of page detection).
摘要:
A digital circuit generates very precise varying clock frequencies for applications that can tolerate a small degree of jitter but require exact longer term frequencies, e.g. a video clock for a laser printer. Some subpixel jitter is acceptable, but the overall pixel rate remains exact and consistent. In some applications, the jitter may be desirable to smear the EMI spectrum. For example, if the high frequency input clock is modulated, the edges of the video clock will also be modulated yet remain within the jitter and frequency specification.
摘要:
The invention provides an architecture and method for implementing a programmable I/O interface. The primary function provides a generic reconfigurable interface for serial communications between a laser printer controller and the print mechanism. The design also supports vertical page synchronization (top of page detection).
摘要:
The invention provides an architecture and method for implementing a programmable I/O interface. The primary function provides a generic reconfigurable interface for serial communications between a laser printer controller and the print mechanism. The design also supports vertical page synchronization (top of page detection).
摘要:
Embodiments of the present invention are described in an integrated circuit. The integrated circuit comprises circuit elements configured to be clocked via an oscillating signal, and a detector. The detector is configured to detect a state of the oscillating signal and provide a detection signal indicative of the state of the oscillating signal. The detector comprises a first delay line configured to provide a first delayed signal to logic that provides the detection signal.
摘要:
Embodiments of the present invention provide an integrated circuit. In one embodiment, the integrated circuit comprises logic blocks, a measurement circuit and a control circuit. The measurement circuit is configured to measure operating parameters of the integrated circuit and the logic blocks and provide operating parameter data. The control circuit is configured to receive the operating parameter data, evaluate the operating parameter data to obtain configuration data and configure the integrated circuit with the configuration data.
摘要:
A printer includes a direct memory access controller (DMA), a video processor, and a video signal generator. A frequency synthesizer connects to the video signal generator. Configuration registers bidirectionally connect to the DMA, video processor, the video signal generator and the frequency synthesizer. A data bus electrically connects the DMA and the configuration registers.
摘要:
Embodiments of the present invention provide an integrated circuit. In one embodiment, the integrated circuit comprises logic blocks and a measurement circuit. The measurement circuit is configured to measure internal operating parameters of the integrated circuit to obtain operating parameter data and provide the operating parameter data for evaluation and configuration of the integrated circuit and the logic blocks.