RENESAS 89H24NT24G2ZCHLGI8

The 89HPES24NT24G2 is a member of the IDT family of PCI Express switching solutions. The PES24NT24G2 is a 24-lane, 24-port system interconnect switch optimized for PCI Express Gen2 packet switching in high-performance applications, supporting multiple simultaneous peer-to-peer traffic flows. Target applications include multi-host or intelligent I/O based systems where inter-domain communication is required, such as servers, storage, communications, and embedded systems.

• High Performance Non-Blocking Switch Architecture
  • 24-lane, 24-port PCIe switch with flexible port configuration
  • Integrated SerDes supports 5.0 GT/s Gen2 and 2.5 GT/s Gen1 operation
  • Delivers up to 24 GBps (192 Gbps) of switching capacity
  • Supports 128 Bytes to 2 KB maximum payload size
  • Low latency cut-through architecture
  • Supports one virtual channel and eight traffic classes
• Port Configurability
  • Twenty-four x1 ports configurable as follows:
    • One x8 stack
    • Eight x1 ports (ports 0 through 7 are not capable of merging with an adjacent port)
    • Two x8 stacks configurable as:
      • Two x8 ports
      • Four x4 ports
      • Eight x2 ports
      • Sixteen x1 ports
  • Automatic per port link width negotiation (x8→x4→x2→x1)
  • Crosslink support
  • Automatic lane reversal
  • Per lane SerDes configuration
    • De-emphasis
    • Receive equalization
    • Drive strength
• Innovative Switch Partitioning Feature
  • Supports up to 8 fully independent switch partitions
  • Logically independent switches in the same device
  • Configurable downstream port device numbering
  • Supports dynamic reconfiguration of switch partitions
    • Dynamic port reconfiguration — downstream, upstream, non-transparent bridge
    • Dynamic migration of ports between partitions
    • Movable upstream port within and between switch partitions
• Non-Transparent Bridging (NTB) Support
  • Supports up to 8 NT endpoints per switch, each endpoint can communicate with other switch partitions or external PCIe domains or CPUs
  • 6 BARs per NT Endpoint
    • Bar address translation
    • All BARs support 32/64-bit base and limit address translation
    • Two BARs (BAR2 and BAR4) support look-up table based address translation
  • 32 inbound and outbound doorbell registers
  • 4 inbound and outbound message registers
  • Supports up to 64 masters
  • Unlimited number of outstanding transactions
• Multicast
  • Compliant with the PCI-SIG multicast
  • Supports 64 multicast groups
  • Supports multicast across non-transparent port
  • Multicast overlay mechanism support
  • ECRC regeneration support
• Integrated Direct Memory Access (DMA) Controllers
  • Supports up to 2 DMA upstream ports, each with 2 DMA channels
  • Supports 32-bit and 64-bit memory-to-memory transfers
    • Fly-by translation provides reduced latency and increased performance over buffered approach
    • Supports arbitrary source and destination address alignment
    • Supports intra- as well as inter-partition data transfers using the non-transparent endpoint
  • Supports DMA transfers to multicast groups
  • Linked list descriptor-based operation
  • Flexible addressing modes
    • Linear addressing
    • Constant addressing
• Quality of Service (QoS)
  • Port arbitration
    • Round robin
  • Request metering
    • IDT proprietary feature that balances bandwidth among switch ports for maximum system throughput
  • High performance switch core architecture
    • Combined Input Output Queued (CIOQ) switch architecture with large buffers
• Clocking
  • Supports 100 MHz and 125 MHz reference clock frequencies
  • Flexible port clocking modes
    • Common clock
    • Non-common clock
    • Local port clock with SSC (spread spectrum setting) and port reference clock input
• Hot-Plug and Hot Swap
  • Hot-plug controller on all ports
    • Hot-plug supported on all downstream switch ports
  • All ports support hot-plug using low-cost external I2C I/O expanders
  • Configurable presence-detect supports card and cable applications
  • GPE output pin for hot-plug event notification
    • Enables SCI/SMI generation for legacy operating system support
  • Hot-swap capable I/O
• Power Management
  • Supports D0, D3hot and D3 power management states
  • Active State Power Management (ASPM)
    • Supports L0, L0s, L1, L2/L3 Ready, and L3 link states
    • Configurable L0s and L1 entry timers allow performance/power-savings tuning
  • SerDes power savings
    • Supports low swing / half-swing SerDes operation
    • SerDes associated with unused ports are turned off
    • SerDes associated with unused lanes are placed in a low power state
• Reliability, Availability, and Serviceability (RAS)
  • ECRC support
  • AER on all ports
  • SECDED ECC protection on all internal RAMs
  • End-to-end data path parity protection
  • Checksum Serial EEPROM content protected
  • Ability to generate an interrupt (INTx or MSI) on link up/down transitions
• Initialization / Configuration
  • Supports Root (BIOS, OS, or driver), Serial EEPROM, or SMBus switch initialization
  • Common switch configurations are supported with pin strapping (no external components)
  • Supports in-system Serial EEPROM initialization/programming
• On-Die Temperature Sensor
  • Range of 0 to 127.5 degrees Celsius
  • Three programmable temperature thresholds with over and under temperature threshold alarms
  • Automatic recording of maximum high or minimum low temperature
• 9 General Purpose I/O
• Test and Debug
  • Ability to inject AER errors simplifies in system error handling software validation
  • On-chip link activity and status outputs available for several ports
  • Per port link activity and status outputs available using external I2C I/O expander for all remaining ports
  • Supports IEEE 1149.6 AC JTAG and IEEE 1149.1 JTAG
• Standards and Compatibility
  • PCI Express Base Specification 2.1 compliant
    • Advanced Error Reporting (AER) on all ports
    • End-to-End CRC (ECRC)
    • Access Control Services (ACS)
    • Device Serial Number Enhanced Capability
    • Sub-System

• servers
• storage
• communications
• embedded systems