BCM68650数据手册集成电路（IC）的片上系统（SoC）规格书PDF

描述 Description

The BCM68650 is a high-performance, single-chip, cost-effective OLT PON MAC SoC. It provides 16 NG-PON2/XGS-PON/XG-PON/GPON/10G AE/10G EPON/EPON OLT PON interfaces.
rBCM68650 integrates PON MACs and burst mode PON SERDES, as well as high-performance LPDDR4 interfaces for ITU-PON reassembly. The NNI Ethernet interface supports 10 Gbps KR/XFI, 12.12 Gbps XFI, and 25 Gbps KR which allows for flexibility when connecting to legacy and newer high performance aggregation switches
rAdditional supported interfaces include two single-lane PCIe 3.0 port (1x endpoint/root complex, 1x root complex), NAND/eMMC, BSC, serial port interface (SPI), UARTs, along with a host of general-purpose inputs/outputs (GPIOs), interrupts, and timers.\\r

特性 Features

• Supports the following integrated MACs, with various co- existence configurations

• 16 x GPON ITU-T G.984 MAC
• 16 x EPON IEEE 802.3ah MAC/1G Active Ethernet
• 16 x XG-PON ITU-T G.987 MAC
• 16 x XGS-PON ITU-T G.9807.1 MAC
• 16 x 10G EPON/10G Active Ethernet IEEE 802.3av MAC
• 16 x NG-PON2 (10/2.5) ITU-T G.989 MAC
• 16 x NG-PON2 (10/10) ITU-T G.989 MAC


• Multi-PON coexistence modes including but not limited to:

• GPON + XGS-PON through WDM1r
• 10G EPON + EPON though WDMA/TDMA


• Integrated burst mode PON SERDES circuitry enabling glueless interfaces to PON optical transceivers
• Integrated 16 x NNI SERDES circuitry supporting 10 Gb/s XFI/KR,12.12 Gb/s, and 25 Gb/s interfaces
•  ITU-T PON flexible upstream bandwidth scheduler:

• Static bandwidth allocation (CBA)
• Dynamic bandwidth allocation (DBA)


• IEEE PON hardware-based DBA:

• SLA enforcement
• CIR/EIR QoS
• TDM granting
• Dynamic polling engine
• Hierarchical scheduling


• Interworking function and queuing:

• VID to X/GEM Port ID/LLID mapping function
• MAC+VID to X/GEM Port ID/LLID mapping function


• Supported MTU:

• 10 KB for GPON/XG-PON/XGS-PON/NG-PON2/ 10G EPON
• 2000B for 1G/2G EPON


• Flow control - downstream (when downstream is congested):

• Flow control is forwarded from the PON MACs to the NNI and used for rate adaptation.
• XOF/XOFF or POFC (PON channels mapped to priority flow control) to the NNI.


• Flow control - upstream (when switch is congested):

• Supports receive of PFC packets from the NNI interface towards the GPON/XG-PON/XGS-PON/NG-PON2 reassembly queues, or the EPON/10G EPON/25G EPON DBA scheduler queues.


• External packet buffer for reassembly:

• Supports 4x 32-bit LPDDR4, up to 2133MHz (4266 MT/s)