71 results about "Synchronous Serial Interface" patented technology

The disclosed gateway device for wireless sensor network comprises: a GPRS communication unit to communicate between the gateway and Internet or wireless communication network, a wireless RF transceiver for gateway and wireless sensor network, and a MPU to control the communication of former two units, wherein the MPU uses UART (general asynchronous serial interface) to communicate with the GPRS unit and SPI (synchronous serial interface) to communicate with the RF transceiver. This invention realizes reliable remote connection and bidirectional transmission for request in real application.

The invention includes a system and method of modifying a setting of a NAND flash memory device using serial peripheral interface (SPI) communication from a master to the NAND flash memory device. One embodiment generally includes sending an enable signal to a first memory circuit input, sending a clock signal to a second memory circuit input, sending a command signal synchronized to the clock signal to a third memory circuit input, sending a memory register address signal synchronized to the clock signal to the third memory circuit input, and sending a setting signal synchronized to the clock signal to the third memory circuit input.

Systems and methods are disclosed which relate to improving synchronization of clocks between a sender and a receiver communicating via an asynchronous serial interface. In a ring topology, a master device is connected to a plurality of slaves communicating using a bi-frequency encoded bit stream. A host device communicates with the master device using a non-return-to-zero data encoding. Each slave receives data from the master and sends it to the next slave in the ring unaltered unless the master indicates a requirement for a particular data, and transmits placeholder bits with a value of 0 around the ring. A particular slave can “fill-in” the placeholder bits with the information to be sent back to the master by inverting the placeholder bit. Clock synchronization between a receiving device and a transmitting device is improved using a fractional rate multiplier to generate a data sampling clock from a system clock. By adjusting the denominator, the sampling clock can be tuned to match the baud rate of the asynchronous serial data stream received from the transmitting device. Embodiments described include power management, data acquisition (DAQ), etc.

A method and system is disclosed for operating a NAND memory device. The NAND memory device is operated by transmitting serial peripheral interface signals from a host to a NAND memory device, whereby the signals are communicated to a NAND memory in the NAND memory device without modifying the signals into a standard NAND memory format. Similarly, a method and system is disclosed for receiving signals from the NAND memory device without modifying the signals from a standard NAND format into a serial format. The system also incorporates error detection and correction techniques to detect and correct errors in data stored in the NAND memory device.

An FPGA-based heterosynchronous switchable serial port and a method of use thereof, the serial port includes a universal asynchronous transceiver, a sending register, and a receiving register, and the universal asynchronous transceiver is mounted on an APB bus for realizing CPU transfer to The universal asynchronous transceiver transmits data, and the described universal asynchronous transceiver is provided with a state detection register, and the sending pin and the receiving pin of the universal asynchronous transceiver are respectively connected to the control end of the sending module FIFO and the receiving module FIFO, and the universal asynchronous transceiver The clock module of the register and the field programmable gate array is connected, and the serial port can be set to synchronous mode or asynchronous mode through the register of the asynchronous transceiver, and the input end of the receiving module FIFO and the output end of the sending module FIFO are respectively connected The receiving module and the sending module, the clock module of the field programmable gate array are respectively connected with the control ends of the receiving channel and the sending channel. The invention supports two interface forms of synchronous serial port and asynchronous serial port, and is compatible with the UART protocol. In the asynchronous serial port mode, the frequency division precision is improved, the bit error rate is reduced, and the stability and accuracy of data are obviously improved.

When using synchronous serial interface of digital signal processor (DSP) sends and receives data, the data transmission signal, the synchronous control interrupt signal, the data send out buffer anddata receive buffer are setup. Under control of the transmission synchronous signal, the send module of the synchronous serial interface and the DMA send data controller sends data; the receive module of the synchronous serial interface and the DMA receive data controller receives data. The synchronous controlled interrupt signal controls the data send and data receive carried out by the DMA controller and the synchronous serial interface in DSP synchronously as well as monitors the data processing carried out by CPU in DSP. This mechanism lowers rate of occupying CPU and the data transmission can be returned to normal automatically when timing signal error or frame synchronous signal error occurs.

The invention discloses a digital strong motion seismograph and a multipath data acquisition interface thereof. The multipath data acquisition interface comprises a data acquisition and control unit, a data conversion unit and a synchronous serial unit, wherein the data acquisition and control unit is used for receiving a command of a microcontroller to set the working mode of an analog-to-digital converter and reset or synchronize the analog-to-digital converter; the data conversion unit is used for converting parallel data output by a signal latching analog-to-digital converter according to the state of the analog-to-digital converter; and the synchronous serial unit is used of converting the parallel data into serial data for outputting to the microcontroller. In the invention, multipath data acquisition of the digital strong motion seismograph is realized by using a complex programmable logic device (CPLD), so that the problems of occupation of a large quantity of general input/output interfaces, reduction in the processing efficiency of the microcontroller, increase in design and realization difficulties and the like caused by the general input/output interface of the microcontroller can be solved.

Embodiments are provided for protecting boot block space in a NAND memory device connected to a host device via an SPI interface. One such method includes programming a boot block password into the NAND memory device such that the host device is required to provide the boot block password in order to access the boot block space. A counter may be provided to track the number of times the host device provides an incorrect password, permanently locking the boot block space if the counter reaches a predetermined value. A further method includes associating each of various areas of the boot block space with at least one write lock bit, setting the write lock bit to a lock enable or lock disable value, and locking or unlocking an area of the boot block space depending on the value of its associated write lock bit. Areas of the boot block space may include a single boot block page, a single boot block, or a plurality of boot blocks.

The embodiment of the invention discloses a method and equipment for selecting a sampling clock signal. The method comprises the following steps: a logical chip acquires a data edge of a data signal and a clock edge of a clock signal, selects a sampling edge according to the data edge and the clock edge, and transmits a selection signal corresponding to the sampling edge to a selector; and the selector selects a sampling clock signal according to the selection signal. By adopting the technical scheme disclosed by the embodiment of the invention, the problems of poor system maintainability and high operation maintenance cost due to the fact that receiving end equipment selects the sampling clock signal by virtue of manual configuration in the existing synchronous serial interface communication can be solved.

An electronic synchronous/asynchronous transceiver device for power line communication networks is integrated into a single chip and operates from a single supply voltage. The transceiver device includes: at least an internal register that is programmable through a synchronous serial interface; at least a line driver for a two-way network communication over power lines implemented by a single ended power amplifier with direct accessible input and output lines that is part of a tunable active filter for the transmission path; and at least a couple of linear regulators for powering with different voltage levels different kind of external controllers linked to the transceiver device.

The invention relates to a method for the unidirectional, asynchronous serial data transfer with an asynchronous data format with F frame bits between a transmitting interface of a data transmitting device and between a data receiving device with a serial receiving interface comprising an asynchronous serial data input. It is provided that the transmitting interface is constructed as a synchronous serial interface with at least one data line, whereby the data line is connected to the asynchronous serial data input of the receiving interface, a data word with D data bits to be transmitted by the data transmitting device in order to generate a format with F frame bits corresponding to the asynchronous data format is supplemented. The data word supplemented with the frame bits is stored in a transmitting register for transmission to the data receiving device.

Byte synchronization between a bus master and a serial interface or other bus slave is maintained and promptly corrected by using a unique signal, issued by the serial interface, to promptly and unambiguously notify the bus master of a loss of synchronization, followed by prompt resynchronization by the bus master. The serial interface sets a selected indicium in a status register equal to a selected value, when an invalid command is sensed at the interface. The bus master reads the status register and, when the selected indicium has the selected value, promptly resynchronizes the serial interface without further delay.

The SYNC serial interface unit is slave unit of AMBA APB bus. The interface unit is composed of some slave module including AMBA APB bus interface module, register set module, transmitting buffer area module, receiving buffer area module, and send receive control module. Through main part configured register mode, slave unit of AMBA APB bus implements transmission of data stream according to protocols: Motorola SPI, Texas Instruments SSI, National Semiconductor Microwire, and Philips I2S. Since I2S circuit is added to the send receive control module, the multifunctional SYNC serial interface unit can be in use for transmitting and receiving audio data stream in I2S protocol. The invention raises usage of pins of chip, system performance and flexibility, and wide application range.

The invention discloses an encoder signal simulation system and method applied to a simulator of a loading and unloading machine. The method includes: firstly calculating a current numerical value of the encoder according to collected speed and moving direction signals sent by a large vehicle, a small vehicle or a main lifting handle of a console of the loading and unloading machine; secondly converting the current numerical value and obtaining an encoder SSI (synchronous serial interface) simulation signal corresponding to an actual encoder value according to a real encoder hardware; and lastly, obtaining a transmission time series of the encoder SSI simulation signal according to a synchronous SSI clock signal sent by an encoder SSI simulation signal receiving device, and sending the encoder SSI simulation signal to the encoder SSI signal receiving device to finish the analogue simulation of the encoder SSI simulation signal. The simulator system and method can flexibly control the encoder simulation signal of the simulator of the loading and unloading machine and simulates different working conditions without relying on the real encoder hardware device, thereby improving the training efficiency of an operator of the loading and unloading machine of a nuclear power station.

The invention provides a synchronous serial interface (SSI) signal sensor data acquisition device, which comprises a digital signal processor (DSP) for an executable program, a serial port and controller area network (CAN) driver group module, an electrically erasable programmable read-only memory (EEPROM), a four-path-SSI driver group module and a two-row-needle type universal plugin, wherein control software for controlling an acquisition device to run is stored in a memory of the DSP. The device supplies various working mode options, such as a sampling rate, an SSI signal data acquisition port, the frequency of a synchronous clock signal and a data forwarding interface, to a user, and the user can select the working modes by collocating parameters on line in a manner that external parameter collocation equipment such as a personal computer and an embedded system is connected with a first serial port of a system to send an instruction according to a protocol; and an automatic judgment mechanism of the system can intelligently judge and process system collocation parameters sent by the user.

This invention provides a kind of method of using the timing serial port to output the asynchronous serial port debug information on the DSP and constructs the asynchronous serial port data frame by using the structure corresponding relationship of the synchronous serial port and the asynchronous serial port data frame and the corresponding relationship of bit clock of the synchronous serial port and the baud rate of the asynchronous serial port; at the same time synchrony the frame of synchronous serial port on the DSP and logical operate the base pin which is used to deliver the data and extend the output values making it met the time sequence of the asynchronous serial port and output the asynchronous serial port debug information. Comparing with the present technology it overcomes the defect that there is no debug information output channel during the reality process for the DSP; it has the well reality and it can capture the abnormal station for the DSP and offer the trace of the location problem; the UART baud rate can be modified and it is convenience to the user.

The invention relates to a method and a device for synthesizing and transmitting a waveform signal. The device comprises a processor and a DA converter, wherein the processor is provided with an internal storage and a high-speed synchronous serial interface; a sinusoidal waveform signal processed by the processor is converted into waveform data and used for storing the waveform data in the internal storage of the processor; an address pointer of an access module of a direct storage points to a storage address for the waveform data; the access module of the direct storage directly controls the stored waveform data and transmits the data to the data analog converter through the synchronous serial interface; and the data analog converter synthesizes and coverts the received waveform data into an analog signal, and then outputs the signal. The invention further comprises a method for using the device. The invention has the characteristics of simple structure, saved cost and easy control.

The invention relates to measured value transmitting devices for serially transmitting data in accordance with the SSI method, Synchronous Serial Interface. At least one slave is provided which provides the data bits of a measured value detected by at least one sensor for the purpose of a serial bit-by-bit transmission to a master. The master requests a measured value from the slave by means of a clock burst that has multiple clock cycles, the number of which matches the number of the data bits to be transmitted. A first measured value transmitting device according to the invention is characterized in that the clock cycles of the clock burst have a specified duty cycle which corresponds to the ratio of the pulse duration to the period duration of one clock cycle, and the master contains a comparator. The master reads the clock bursts outputted on the at least one clock line and checks the duty cycle in the comparator to determine whether an upper threshold and/or a lower threshold has been exceeded. A second measured value transmitting device according to the invention is characterized in that a corresponding check of the duty cycle is carried out in the slave.

The invention discloses a universal auxiliary computer synchronous serial interface circuit comprising a starting and ending detection module, a control module, a parallel-serial/serial-parallel conversion module and an address pointer register. The starting and ending detection module is used for detecting and outputting a significance bit of an SPI bus protocol, and a starting condition and an ending condition of an IIC bus protocol. The control module is used for determining a bus data transmission mode of the serial interface circuit according to an output signal of the starting and ending detection module, and controlling the parallel-serial/serial-parallel conversion module. The parallel-serial/serial-parallel conversion module is controlled by the control module, and is used for outputting data of multiple register data inside an auxiliary computer in a serial mode, and converting external serial data into the data of the registers inside the auxiliary computer. The address pointer register is used for carrying out addressing on the resisters inside the auxiliary computer. The universal auxiliary computer synchronous serial interface circuit achieves compatibility of the bus data transmission of the IIC protocol and the SPI protocol, and can meet the application requirements of different occasions.

A slave device for exchanging data with a master device over a serial interface sends data to the master device upon receipt of a command from the master device. A controller responsive to a command byte in a receive register commences transmission of data in the transmit register under the control of a clock signal prior to reception of a complete command.

The invention discloses a digital servo controller and a corresponding servo control system. The digital servo controller comprises a power transformation circuit which is coupled to a direct-current power supply and is used for supplying power to the digital servo controller, a micro processor, and a digital signal interface module, an analog signal interface module, an asynchronous serial interface module and a synchronous serial interface module which are in signal connection with the micro processor, wherein the micro processor controls a control state of the digital servo controller according to an input signal of the digital signal interface module, acquires an instruction signal through the asynchronous serial interface module or the analog signal interface module, acquires a feedback signal through the analog signal interface module or the synchronous serial interface module, and produces a driving signal by proportion integration differential operation according to the instruction signal and the feedback signal. The digital servo controller has high reliability under a severe industrial environment; and the real-time running speed meets the requirement of high-speed and high-precision motion equipment completely.

The invention discloses a synchronous serial interface device with expandable frame width, which comprises a register group unit, a processor bus interface unit , a transmitting and receiving control unit, a transmitting buffer unit, a receiving buffer unit and a receiving buffer unit, wherein the register group unit is connected with the processor bus interface unit; the processor bus interface unit is connected with a peripheral processor bus; the transmitting buffer unit is respectively connected with the register group unit and the transmitting and receiving control unit; the receiving buffer unit is respectively connected with the register group unit and the transmitting and receiving control unit; the transmitting and receiving control unit comprises a transmitting and receiving configuration circuit and an extended frame protocol circuit; the transmitting and receiving configuration circuit is used for configuring the extended frame protocol circuit; and the extended frame protocol circuit self-defines the format of an extended frame and is used for realizing the largest frame width to n bits, and n is a natural number larger than 16. The invention can provide the adjustable characteristic of larger width range of frame format to enable a SOC chip to be connected with more peripheral chips, thereby realizing a whole product with lower cost and better quality.