Altera POS-PHY Level 4 IP Core - Manual (Page 5)

Chapter 1: About This IP Core 1–3
General Description
December 2014 Altera Corporation POS-PHY Level 4 IP Core User Guide
■ Error detection and handling
■ Protocol checking—SPI-4.2 datapath state machine check and repair
■ Atlantic FIFO buffer overflow handling
■ Status framing hysteresis (good and bad thresholds)
■ DIP-4 hysteresis (good and bad thresholds)
■ IP functional simulation models for use in Altera-supported VHDL and Verilog
HDL simulators
■ I-Tested certification
General Description
The packet over SONET/SDH physical layer (POS-PHY) Level 4 interface, first
developed by the SATURN
® Development Group, was adopted by the Optical
Internetworking Forum (OIF) as the System Packet Interface Level 4—Phase 2 (SPI-
4.2). Therefore, POS-PHY Level 4 and SPI-4.2 are synonymous.
The POS-PHY Level 4 IP core uses the SPI-4.2 interface for high-speed cell and packet
transfers between physical (PHY) and link-layer devices. The SPI-4.2 interface
supports a data width of 16 bits (LVDS solution) and can be a PHY-link, link-link, link-
PHY, or PHY-PHY connection in multi-gigabit applications, including: asynchronous
transfer mode (ATM) and packet over SONET/SDH (STS-192/STM-64), 10 Gigabit
Ethernet, and multi-channel Gigabit and Fast Ethernet.
In compliance with the SPI-4.2 interface specification, the POS-PHY Level 4 IP core
allows you to implement transmit and receive functions.
Figure 1–1 shows a full-duplex POS-PHY Level 4 IP core configured for the link layer
in an Altera FPGA device.
Figure 1–2 shows a full-duplex POS-PHY Level 4 IP core configured for the PHY layer
in an Altera FPGA device.
Figure 1–1. POS-PHY Level 4 IP Core as Link Layer Configuration
FPGA
SPI-4.2 Interface
Switch
Interface
User Packet
Processing
OC-192
POS Framer
or
10 GbitE MAC
Switch
Fabric
Atlantic Interface
POS-PHY Level 4
Receiver
POS-PHY Level 4
Transmitter
Figure 1–2. POS-PHY Level 4 IP Core as PHY Layer Configuration
OC-192 or
10 GbitE
FPGA
Framer or MAC
Logic
Packet
Classifier
SPI-4.2 Interface Atlantic Interface
POS-PHY Level 4
Receiver
POS-PHY Level 4
Transmitter