摘要:
A method includes removing a code segment from a hardware description language design to create a modified hardware description language design. The code segment represents at least one time sensitive path in the hardware description language design. The method includes creating a delta list of differences between the modified hardware description language design and a physical hardware representation that is logically equivalent to the hardware description language design. The method includes extracting a portion of the physical hardware representation that corresponds to the time sensitive path based, at least in part, on the delta list. The method also includes creating a structured hardware description language design of the time sensitive path using the extracted portion of the physical hardware representation, wherein the structured hardware description language design comprises structural information of the extracted portion of the physical hardware representation.
摘要:
Redundant time-of-day (TOD) oscillators are aligned, within a master oscillator path, to local logic oscillator and used to create independent step-sync signals. A step checker validates and provides selection signals to identify which of the TOD oscillators operates according to a criterion. Independent step-sync signals are transmitted to several sibling chips. Local step and sync signals are delayed to arrive at TOD register nearly synchronous with TOD registers in sibling chips. A slave oscillator path may be used to select time signals generated in a sibling chip, whereby the master oscillator path is deselected. A primary control register set may be used to configure which among several chips is a master chip using the master oscillator path. All remaining chips are slave chips. All segments of the topology are redundant. One of multiple possible alternate topologies is defined in a secondary control register set. Commands and TOD values are passed on the fabric at predefined time increment boundaries to establish, restore, or maintain synchronization across all chips.
摘要:
A method, apparatus, and computer program product in a data processing system for testing differential clock or oscillator signals. A method is comprised of the following steps: A first single-ended receiver is connected to a positive leg of a differential pair, and a second single-ended receiver is connected to a negative leg of the differential pair. An output of the first single-ended receiver is inverted and delayed before being input into a first RS Flip-Flop. An output of the second single-ended receiver is delayed before being input into a second RS Flip-Flop. An output of a differential receiver is inverted and input into the first and second RS Flip Flops as reset signals. Then a Wire OK signal is output indicating the condition of the legs of the differential pair.
摘要:
The present invention relates to system clocking in computer systems. In particular, it relates to system clocking in high-end multi-processor, multi-node server computer systems with an enhanced degree of performance and reliability and to a method for dynamically switching between a first and a second clock signal, if the first should fail. More redundancy even to the Dynamic Clock Switching Circuit (DCSC) (14) and the wiring (17) from there to multiple, PLL-(12) free clock chips (22) is provided. Instead of only one DCSC (14) and one single wiring (17), two of them (14-0, 14-1; 17-0, 17-1) are used combined with a further particular logic present on each clock chip (22), which in combination generate two synchronous, fine-tuned, minimum-shifted clock signals and select always the first of them to arrive at a FlipFlop controlling the output for clock distribution wiring.
摘要:
An electrical circuit for generating clock pulses for a multi-chip computer system which contains a clock generation chip and various logic circuit chips. The clock pulses used on the logic circuit chips are generated on the clock generation chip and are transferred to the logic circuit chips. For the generation of the clock pulses a so-called clock splitter circuit is provided on the clock generation circuit. This clock splitter generates two pulse strings out of a third pulse string which is derived from an oscillator. The clock splitter contains a number of gates and latches which have an impact on the throughput time of a pulse to run through the clock splitter, as well as on the skew of the two generated pulse strings. The invention provides an electrical circuit which has an improved throughput time and skew of the generated pulse strings.
摘要:
A digital adder circuit comprising a plurality of logical stages in the carry logic of said adder circuit, for generating and propagating predetermined groups of operand bits, each stage implementing a predetermined logic function and processing input variables from a preceding stage and outputting result values to a succeeding stage static and dynamic logic in the carry network of a 4-bit adder, and with output from the first stage fed directly as an input (60, 62) to the third stage of the carry network. Preferably, stages having normally relatively high switching activities are implemented in static logic. Preferably, the first stage of its carry network is implemented in a static logic, and the rest of the stages in dynamic logic.
摘要:
Redundant time-of-day (TOD) oscillators are aligned, within a master oscillator path, to local logic oscillator and used to create independent step-sync signals. A step checker validates and provides selection signals to identify which of the TOD oscillators operates according to a criterion. Independent step-sync signals are transmitted to several sibling chips. Local step and sync signals are delayed to arrive at TOD register nearly synchronous with TOD registers in sibling chips. A slave oscillator path may be used to select time signals generated in a sibling chip, whereby the master oscillator path is deselected. A primary control register set may be used to configure which among several chips is a master chip using the master oscillator path. All remaining chips are slave chips. All segments of the topology are redundant. One of multiple possible alternate topologies is defined in a secondary control register set. Commands and TOD values are passed on the fabric at predefined time increment boundaries to establish, restore, or maintain synchronization across all chips.
摘要:
Redundant time-of-day (TOD) oscillators are aligned, within a master oscillator path, to local logic oscillator and used to create independent step-sync signals. A step checker validates and provides selection signals to identify which of the TOD oscillators operates according to a criterion. Independent step-sync signals are transmitted to several sibling chips. Local step and sync signals are delayed to arrive at TOD register nearly synchronous with TOD registers in sibling chips. A slave oscillator path may be used to select time signals generated in a sibling chip, whereby the master oscillator path is deselected. A primary control register set may be used to configure which among several chips is a master chip using the master oscillator path. All remaining chips are slave chips. All segments of the topology are redundant. One of multiple possible alternate topologies is defined in a secondary control register set. Commands and TOD values are passed on the fabric at predefined time increment boundaries to establish, restore, or maintain synchronization across all chips.
摘要:
A method of manufacturing metallic components consisting of at least two different materials, one of them being an iron-based alloy and the other an aluminum-based alloy, and involving the steps of: depositing a metallic layer onto the body made from the iron-based alloy, said layer being an aluminum-based alloy, preferably based on Al—Si or Fe, placing the coated body in a casting mold and casting an aluminum-based alloy about the coated body. Prior to placing the body in the casting mold, the metallic layer of the body is sprayed and/or blasted with silicon powder and/or Borax (Na2B4O7—10H2O, hydrated sodium borate).
摘要翻译:一种制造由至少两种不同材料组成的金属组件的方法,其中一种是铁基合金,另一种是铝基合金,包括以下步骤:将金属层沉积在由铁 - 所述层是铝基合金,优选基于Al-Si或Fe,将涂覆体放置在铸模中并且在涂覆体周围浇铸铝基合金。 在将本体放置在铸模中之前,用硅粉和/或硼砂(Na 2 B 4 O 4)喷射和/或喷射身体的金属层, N 2,水合硼酸钠)。
摘要:
Redundant time-of-day (TOD) oscillators are aligned, within a master oscillator path, to local logic oscillator and used to create independent step-sync signals. A step checker validates and provides selection signals to identify which of the TOD oscillators operates according to a criterion. Independent step-sync signals are transmitted to several sibling chips. Local step and sync signals are delayed to arrive at TOD register nearly synchronous with TOD registers in sibling chips. A slave oscillator path may be used to select time signals generated in a sibling chip, whereby the master oscillator path is deselected. A primary control register set may be used to configure which among several chips is a master chip using the master oscillator path. All remaining chips are slave chips. All segments of the topology are redundant. One of multiple possible alternate topologies is defined in a secondary control register set. Commands and TOD values are passed on the fabric at predefined time increment boundaries to establish, restore, or maintain synchronization across all chips.