摘要:
A semiconductor chip package comprising at least one semiconductor chip disposed in a package and a plurality of first and second pins extending from the package, which first pins are electrically connected to the at least one semiconductor chip and are adapted to conduct signals between the at least one semiconductor chip and external circuitry, the first pins being divided into a plurality of groups, each group representing a respective signal type, and which second pins are not electrically connected to the at least one semiconductor chip, the first pins of at least one group and the second pins being asymmetrically disposed along edges of the package and the remaining groups of first pins being symmetrically disposed along edges of the package. The invention also provides a stacked module of the semiconductor chip packages.
摘要:
A method of encoding first and second symbols each having n binary bits into first and second code words each having n-1 ternary trits is disclosed. The method involves using a preselected bit from each of the first and second symbols to determine which one of at least two groups of code words comprising n-1 trits is used for encoding. An analogous method of decoding is also disclosed. Apparatus for performing the encoding and decoding is disclosed.
摘要:
A method of encoding data for transmission between computer devices is disclosed in which data is encoded into a plurality of sequences, each sequence containing an equal number of ones and zeros and being of a predetermined bit length. There is a finite set of the permutations of equal numbers of ones and zeros in that predetermined bit length. One subset of the finite set is selected for use as data codes and a second subset is selected for use as control codes.
摘要:
A computer device comprises a processor for executing a plurality of concurrent processes each comprising a sequence of instructions, memory including RAM, at least one message link having input and output pins for connection to a device separate from said computer device and for transmitting message packets sequentially between the computer device and said separate device, and communication control circuitry coupled to said processor, to said memory, and to said message link. The memory provides a plurality of addressable virtual communication links. The communication control circuitry is operable:(i) in response to execution of a message instruction by said processor to address a selected one of said virtual communication links and load into the selected one information regarding the message to be effected via the virtual communication link; and(ii) to control sequential transmission through said one message link of message packets relating to a plurality of virtual communication links.A network of such computer devices and a method of operation is also described. The provision of virtual links enables several messages to be multiplexed down a single message link of the microcomputer.
摘要:
A semiconductor chip package comprising at least one semiconductor chip disposed in a package and a plurality of first and second pins extending from the package, which first pins are electrically connected to the at least one semiconductor chip and are adapted to conduct signals between the at least one semiconductor chip and external circuitry, the first pins being divided into a plurality of groups, each group representing a respective signal type, and which second pins are not electrically connected to the at least one semiconductor chip, the first pins of at least one group and the second pins being asymmetrically disposed along edges of the package and the remaining groups of first pins being symmetrically disposed along edges of the package. The invention also provides a stacked module of the semiconductor chip package.
摘要:
A scheme for altering checking information in a message packet intended to be transmitted between computers is described. In this scheme, when an information portion of the packet is altered, checking bits contained in the packets are altered in dependence only on the set of checking bits in the message packet before modification of the information portion and on the modifications to the information portion. Thus, it is not necessary to generate new checking bits from a modified information portion.
摘要:
A routing switch includes an input for receiving serial packets from a source node in a computer network, a plurality of outputs, switch circuitry for selectively interconnecting said input to a selected one of said outputs and header reading circuitry for reading the header portion of a packet received at the input prior to receiving all of the packet. The switch also has a random header generator which produces header portions generated at random which are then read by the header reading circuitry. The header reading circuitry is coupled to the switch circuitry to connect to said input one of said outputs in dependence on said random header. The random header portion is then discarded at the routing switch identified thereby to reveal the original header.
摘要:
A semiconductor device comprising at least one semiconductor chip, the or each semiconductor chip having a plurality of chip bonding pads, a package which encloses the at least one semiconductor chip, a first level interconnect comprising a printed circuit which overlies the at least one semiconductor chip in the package and extends externaly of the package to provide a plurality of outer leads, and a second level interconnect comprising means for electrically connecting the chip bonding pads to selected contacts on the printed circuit, which contacts overlie the at least one semiconductor chip. The invention also relates to a method of manufacturing such a semiconductor device and to a method of assembling a semiconductor assembly.
摘要:
A method of encoding a five bit symbol into a four trit code word is disclosed, comprising defining out of forty-eight combinations of four trit code words three groups, each group containing sixteen code words, each code word within a group having a Hamming distance of at least two from any other code word in the group, and each code word being associated with a particular combination of four bits selected from said five bit symbol. An analogous method of decoding is also disclosed. Apparatus for performing the encoding and decoding is disclosed.
摘要:
A routing switch includes an input for receiving serial packets from a source node in a computer network, a plurality of outputs each designating a respective range of destination node identifications, switch circuitry for selectively interconnecting said input to a selected one of said outputs and header reading circuitry for reading the header portion of a packet received at the input prior to receiving all of the packet. The header reading circuitry is coupled to the switch circuitry to connect to said input one of said outputs having a node identification range including the node identification of said header portion.There is also provided a computer network, having a plurality of computer devices and at least one routing switch, and a method of routing messages through such a network.