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Arm Neoverse CMN‑650 Coherent Mesh Network Technical Reference Manual r2p0

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Arm  Neoverse  CMN‑650 Coherent Mesh Network

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I/O coherent Request Node (RN-I) and I/O coherent Request Node with DVM support (RN-D)

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Permitted numbers of devices and system resources in the mesh

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HN-F RAM Power Control State Machine interface

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RN entry to and exit from snoop and DVM domains

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Extended CCIX Requesting Agent ID mechanism for up to 512 RN-Fs

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Support for HN-Fs with CAL in the RN SAM

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Support for PrefetchTgt operations in RN SAM

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Address range-based QoS override and PrefetchTgt support

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HN-F to SN-F memory striping in HN-F SAM

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Example 3-SN, 5-SN, and 6-SN mode configurations

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Maintaining contiguous address spaces in SN-Fs

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Configuring HN-I SAM address regions and order regions

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Dual DAT/RSP channel selection registers

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Dedicated RN-I resources for AXI port traffic

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Rules for avoiding deadlocks in non-XY routing

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Routing transactions across multi-chip systems

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Mapping SF LDID vector values to snoop targets in HN-F

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LDID assignment when using SF clustering

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PCIe master and slave restrictions and requirements

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Generic Interrupt Controller communication over AXI4-Stream ports

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Error detection and deferred error values

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Error detection, signaling, and reporting

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Support for early completion of DVMOp requests

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Node configuration register address mapping

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Requirements of configuration register reads and writes

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Program the dual DAT/RSP channel selection scheme

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Discover and bring up a local CMN‑650 system

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Program CML system to enable CCIX communication

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Options when programming CXG auxiliary control and configuration control registers

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Assign LinkIDs to remote CCIX protocol links

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Program CCIX protocol link control registers

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Establish protocol link up between CXG and remote CCIX link

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Link down CCIX protocol link between CXG and remote CCIX link

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CCIX entry and exit protocol links from coherency domains and DVM domains

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SLC memory system components and configuration

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Non-clustered and clustered mode for SF RN-F tracking

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Configuring clustered mode for SF tracking

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Error reporting and software-configured error injection

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Transaction handling in SLC memory system

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CMO and PCMO propagation from HN-F to SN-F or SBSX

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Memory System Performance Resource Partitioning and Monitoring

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QoS class and POCQ resource availability

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Requested read bandwidth at RN-I bridges

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Read bandwidth on interconnect at SBSX bridges

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Total requested bandwidth at SBSX bridges

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Delays at SBSX bridges due to backpressure

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Read bandwidth on interconnect at HN-I bridges

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Total requested bandwidth at HN-I bridges

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Delays at HN-I bridges because of ordering requirements

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Delays at HN-I bridges because of backpressure

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Occupancy and lifetime measurement using PMU events

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HN‑I and HN‑P AxID signal properties and encodings

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RN-D ACE-Lite-with-DVM device population signals

# metadata.contentDescription
This book is for the Arm Neoverse CMN‑650 Coherent Mesh Network product.