Programmed Input/Output Message Control Circuit

    公开(公告)号:US20220365900A1

    公开(公告)日:2022-11-17

    申请号:US17320082

    申请日:2021-05-13

    Applicant: Apple Inc.

    Abstract: In an embodiment, a system on a chip (SOC) comprises a semiconductor die on which circuitry is formed, wherein the circuitry comprises a memory controller circuit and a plurality of networks formed from a plurality of individual network component circuits. The memory controller includes a PIO message control circuit that is configured to receive PIO messages addressed to individual network component circuits and determine whether to send the PIO messages to the individual network component circuits based on determine whether previous PIO messages are pending for the individual network component circuits. The PIO message control circuit is configured to delay a first PIO message at the PIO message control circuit in response to determining that previous PIO message is pending for the addressee of the first PIO message.

    Multiple Independent On-chip Interconnect

    公开(公告)号:US20220334997A1

    公开(公告)日:2022-10-20

    申请号:US17337805

    申请日:2021-06-03

    Applicant: Apple Inc.

    Abstract: In an embodiment, a system on a chip (SOC) comprises a semiconductor die on which circuitry is formed, wherein the circuitry comprises a plurality of agents and a plurality of network switches coupled to the plurality of agents. The plurality of network switches are interconnected to form a plurality of physical and logically independent networks. A first network of the plurality of physically and logically independent networks is constructed according to a first topology and a second network of the plurality of physically and logically independent networks is constructed according to a second topology that is different from the first topology. For example, the first topology may a ring topology and the second topology may be a mesh topology. In an embodiment, coherency may be enforced on the first network and the second network may be a relaxed order network.

    Data encoding and packet sharing in a parallel communication interface

    公开(公告)号:US12047302B2

    公开(公告)日:2024-07-23

    申请号:US18326246

    申请日:2023-05-31

    Applicant: Apple Inc.

    CPC classification number: H04L47/35 H04L47/32 H04L69/22

    Abstract: An apparatus includes an interface circuit and an encoder circuit. The interface circuit is configured to send a data packet via a plurality of segments, and to send an idle value via the plurality of segments when no data packet is available. The idle value is configured to cause a segment in a receiving apparatus to idle. The encoder circuit is configured to receive a particular data packet, and, if a portion of the particular data packet has a same value as the idle value for a subset of the plurality of segments, to replace at least a portion of the data packet with a mask value to generate a modified data packet. The mask value indicates how to recreate the particular data packet. The encoder circuit is further configured to send the modified data packet to the receiving apparatus via the plurality of segments of the interface circuit.

    Complementary Die-to-Die Interface

    公开(公告)号:US20220284163A1

    公开(公告)日:2022-09-08

    申请号:US17194003

    申请日:2021-03-05

    Applicant: Apple Inc.

    Abstract: A system includes a first instance and a second instance of an integrated circuit. The integrated circuits include respective external interfaces with a physical pin layout having transmit and receive pins for a particular bus located in complementary positions relative to an axis of symmetry. The external interfaces of the first and second instances of the integrated circuit are positioned such that the transmit and receive pins for the given I/O signal on the first instance are aligned, respectively, with the receive and transmit pins for the given I/O signal on the second instance.

    Complementary Die-to-Die Interface

    公开(公告)号:US20240403532A1

    公开(公告)日:2024-12-05

    申请号:US18799297

    申请日:2024-08-09

    Applicant: Apple Inc.

    Abstract: A system includes a first instance and a second instance of an integrated circuit. The integrated circuits include respective external interfaces with a physical pin layout having transmit and receive pins for a particular bus located in complementary positions relative to an axis of symmetry. The external interfaces of the first and second instances of the integrated circuit are positioned such that the transmit and receive pins for the given I/O signal on the first instance are aligned, respectively, with the receive and transmit pins for the given I/O signal on the second instance.

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