Abstract:
A control device is provided for controlling a buffer memory that can store n data words and is capable of being used for data transfer between a first system and a second system. The control device includes a write pointer and a read pointer. The control device also includes a write management circuit and a read management circuit. The write management circuit compares the content of the write pointer and the content of the read pointer, and authorizes or does not authorize a write operation in the memory. The read management circuit compares the content of the write pointer and the content of the read pointer, and authorizes or does not authorize a read operation in the memory.
Abstract:
An analog-digital delta-sigma converter includes a plurality of continuous time integrators for performing a delta-sigma modulation. Each integrator includes at least one charge sharing integrator at a modulator input. One or more pure integrators follow the charge sharing integrator.
Abstract:
A method is for transferring data from a source target to a destination target in a network. The method includes sending at least one request packet for the destination target, with the request packet containing information relating to a first address where data are located and a second address where data are to be stored. Moreover, at least one transaction request is sent to the source target, with the read request being elaborated from information contained in the request packet. The source target transfers the data located at the first address to the second address.
Abstract:
A method generates an image from a set of image zones each delimited by a contour of polygonal shape defined by a set of vertexes, and comprising pixels having an attribute value which can be deduced from the value of a corresponding attribute of each of the vertexes of the image zone. The method includes determining to within a pixel the pixels that belong to each image zone according to the dimensions in number of pixels of the image to be generated; associating the pixels of each image zone in blocks of pixels; and determining an attribute value for each block of pixels of each image zone as a function of the value of the corresponding attribute of each vertex of the image zone.
Abstract:
The conversion device includes an input for receiving data corresponding to an image to be displayed. The received data is in a JPEG decoder output data format A processor is included for reconstructing and writing the image to be displayed into the image memory, in a display module expected input data format. The bandwidth of the image memory is greater than one byte. The processor is fully hardwired and includes a first logic stage for writing the received data byte by byte into an intermediate memory at chosen addresses such that the written data form a sequence of data in the display module expected input data format, and a second logic stage for reading the written data in the intermediate memory, forming successive packets of read data having a size corresponding to the bandwidth, and successively writing the packets into the image memory at chosen addresses such that the written packets together form all the lines of the image.
Abstract:
An integrated circuit having a connection terminal for receiving an electric data carrying signal, a circuit for delivering a first clock signal having clock pulses sent after each falling edge of the electric data carrying signal and inside a data sampling window, a circuit for delivering a second clock signal having clock pulses sent only when the electric data carrying signal is at the high level, and a data processing circuit clocked by the second clock signal.
Abstract:
A method for automatic gain control of an output signal generated from an input signal includes measuring power of the output signal. Measuring power of the output signal includes setting at least one power threshold, measuring a rate of crossing of the at least one power threshold by the output signal over an observation window, and deriving from the rate of crossing a measured power of the output signal. The method further includes providing a reference power, subtracting the measured power from the reference power to obtain an error signal, and mixing the input signal with the error signal. An analog-to-digital conversion is performed on a result of the mixing to obtain a gain-controlled output signal.
Abstract:
An array of ROM cells, each formed of a transistor having a first drain or source region connected to a bit line connecting several transistors in a first direction, the gates of the different transistors being connected to word lines in a second direction perpendicular to the first one, the array comprising a repetition of an elementary pattern extending over three lines in each direction and comprising nine transistors arranged so that each of the lines of the elementary pattern comprises two cells, two neighboring transistors of each pattern in the first direction sharing a same second region connected to a ground line and being connected to different bit lines from a word line to the other.
Abstract:
The invention relates to a process for compression of executable code (2) by a microprocessor, comprising steps consisting of decomposing the executable code into words; compressing each word of executable code, each compressed word of executable code comprising a part (BC) of predefined fixed length and a part (VLI) of variable length whereof the length is defined by the part of fixed length; and combining all the parts of fixed length and all the parts of variable length of the words respectively into a block of parts of fixed length and in a block (12) of parts of variable length, the respective positions of at least certain parts of variable length in the block of parts of variable length being saved in an addressing table (13).
Abstract:
A method reads a datum saved in a memory by selecting an address of the memory in which the datum to be read is saved, reading the datum in the memory at the selected address, saving the datum read in a storage space, and when the memory is not being accessed by a CPU, reading the datum in the memory, reading the datum saved in the storage space, and activating an error signal if the datum read in the memory is different from the datum saved. The method can be applied particularly to the protection of smart card integrated circuits.