Altera Stratix - High-Speed Interfaces; Oif-Spi4.2; Oif-Sfi4.1

Altera Corporation 4–15
June 2006 Stratix Device Handbook, Volume 2
Selectable I/O Standards in Stratix & Stratix GX Devices
f See the Stratix Device Family Data Sheet section in the Stratix Device
Handbook, Volume 1; the Stratix GX Device Family Data Sheet section of the
Stratix GX Device Handbook, Volume 1; and the High-Speed Differential I/O
Interfaces in Stratix Devices chapter for more information on differential
I/O standards.
High-Speed
Interfaces
In addition to current industry physical I/O standards, Stratix and
Stratix GX devices also support a variety of emerging high-speed
interfaces. This section provides an overview of these interfaces.
OIF-SPI4.2
This implementation agreement is widely used in the industry for
OC-192 and 10-Gbps multi-service system interfaces. SONET and SDH
are synchronous transmission systems over which data packets are
transferred. POS-PHY Level 4 is a standard interface for switches and
routers, and defines the operation between a physical layer (PHY) device
and link layer devices (ATM, Internet protocol, and Gigabit Ethernet) for
bandwidths of OC-192 ATM, POS, and 10-Gigabit Ethernet applications.
Some key POS-PHY Level 4 system features include:
■ Large selection of POS-PHY Level 4-based PHYs
■ Independent of data protocol
■ Wide industry support
■ LVDS I/O standard to improve signal integrity
■ Inband addressing/control
■ Out of band flow control
■ Scalable architecture
■ Over 622-Mbps operation
■ Dynamic interface timing mode
POS-PHY Level 4 operates at a wide range of frequencies.
OIF-SFI4.1
This implementation agreement is widely used in the industry for
interfacing physical layer (PHY) to the serializer-deserializer (SERDES)
devices in OC-192 and 10 Gbps multi-service systems. The POS-PHY
Level 4 interface standard defines the SFI-4 standard. POS-PHY
Level 4: SFI-4 is a standardized 16-bit × 622-Mbps line-side interface for
10-Gbps applications. Internet LAN and WAN architectures use
telecommunication SONET protocols for data transferring data over the
PHY layer. SFI-4 interfaces between OC-192 SERDES and SONET
framers.