摘要:
A data transfer interface apparatus and method for controlling data transfer. The data transfer interface apparatus includes a first storage unit for storing an input data according to a first clock and for outputting a first output data according to a second clock, a single-port memory coupled to the first storage unit for storing the first output data according to the second clock and for outputting a second output data according to the second clock, and a second storage unit coupled to the single-port memory for storing the second output data according to the second clock and for outputting a third output data according to a third clock.
摘要:
A method for up/down converting display data employs steps of generating a first clock signal, generating display data, writing the display data into a buffer using the first clock signal, generating a second clock signal, reading out the display data written into the buffer using the second signal, and transmitting the read-out display data to a display module.
摘要:
A phase-locked loop includes a phase/frequency detector for generating phase error signal according to a reference signal and an input signal, a charge pump for outputting a voltage signal according to the phase error signal, a voltage-controlled oscillator for outputting an output signal corresponding to the phase error signal according to the voltage signal, an adaptive adjusting unit for outputting a control signal according to the phase error signal, so as to form a nonlinear between the output signal and the phase error signal.
摘要:
A digital fractional phase detector is shown that uses a phase error detector for generating a phase error signal based on the phase difference between a reference clock signal and a feedback clock signal. A quantizer directly measures the pulse width of a phase error signal and outputs the value in a digital form. By directly measuring the phase error signal, quantization accuracy is increased. In order to calibrate the digital fractional phase detector, a calibration pulse generator generates a calibration pulse of a known duration and passes it to the quantizer.
摘要:
A receiver includes; a recovery circuit for receiving an input signal, and generating a data signal and a recovery clock; a processing circuit for processing the data signal to generate a processed signal; and a synchronization determining circuit for determining a synchronization state of the recovery clock according to the processed signal and a first reference value. The data signal includes a synchronous pattern, and the first reference value corresponds to at least a portion of a value in the synchronous pattern processed by the processing circuit. A method of the receiver is also disclosed.
摘要:
A sync signal acquisition device is disclosed which comprises a transistor, a resistor, a clamper, an analog multiplexer and a comparator. While operating in a composite HS mode, prior to the generation of the sync signal HS, the invention uses a conventional circuit to extract a composite sync signal at start-up, thereby allowing related circuits to generate the sync signal HS and a clamping signal. Then, a mode selecting signal is used to disable the automatic clamping mode and switch the analog multiplexer to a forced clamping mode. At this point, the output voltage of the damper is set by a user instead of process; accordingly, the DC voltage level is more controllable, but not subject to drift due to process changes or temperature changes.
摘要:
A method for adjusting parameters of an adaptive equalizer makes use of a transmitted signal received by a receiving end to adjust parameters of an adaptive equalizer. First, signal strengths of a first frequency band and a second frequency band in the transmitted signal are detected. The signal strengths of the first frequency band and the second frequency band are then compared to get a compensation ratio, i.e., the total compensation quantity of the first frequency band to the second frequency band. Finally, the parameter setting of the equalizer is adjusted according to feedback of the compensation ratio. Optimum gain control of the adaptive equalizer can thus be accomplished to compensate signal attenuation to the transmitted signal caused by the channel.
摘要:
A system for updating firmware through a DisplayPort interface includes a source device with a DisplayPort interface, and a sink device with a DisplayPort interface. The source device includes a storage circuit for storing and providing an updated firmware, and a source device auxiliary channel for outputting the updated firmware with an auxiliary channel signal format. The sink device includes a sink device auxiliary channel for receiving the updated firmware with the auxiliary channel signal format and thereby generating an output signal, an I2C auxiliary channel device servicer for receiving the output signal and generating an I2C protocol updated firmware, and a memory unit for updating firmware according to the I2C protocol updated firmware. A method for updating firmware is also disclosed.
摘要:
A timing controller for a display processing device includes: a plurality of predetermined pins for receiving an image signal by a pin-share method, wherein the image signal is a first format image signal or a second format image signal; a detector coupled to the predetermined pins and for detecting at least one of the predetermined pins to determine whether the image signal is the first format image signal or the second format image signal and outputting a detection result; and a processor coupled to the detector and for processing the image signal according to the detection result to generate and output a timing control signal.
摘要:
A phase-locked loop (PLL) for rapid lock-in applicable to digital, analog, or hybrid digital-analog PLL circuits is provided. Besides the units for basic operation, including a phase-frequency detector (PFD), a charge pump, a loop filter, and/or a voltage/current/digital-controlled oscillator (VCO/ICO/DCO), an additional lock-in actuator circuit is provided for providing lock-in signals, achieving the purpose of rapid lock-in through operational processes.