General-Purpose Serial Interface

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General Purpose Serial Interface, also known as GPSI, 7-wire interface, or 7WS, is a 7 wire communications interface. It is used as an interface between Ethernet MAC and PHY blocks.

Data is received and transmitted using separate data paths (TXD, RXD) and separate data clocks (TXCLK, RXCLK). Other signals consist of transmit enable (TXEN), receive carrier sense (CRS), and collision (COL).

GPSI Signals
Signal Name	Direction	Description
TXD	MAC > PHY	Transmit Data (driven on rising edge of TXCLK)
TXEN	MAC > PHY	Transmit Data Enable (indicates valid TXD)
... etc. ...	...	...

References

v t e Ethernet family of local area network technologies
Speeds	10 Mbit/s 100 Mbit/s 1 Gbit/s 2.5 and 5 Gbit/s 10 Gbit/s 25 and 50 Gbit/s 40 and 100 Gbit/s 200, 400, 800 and 1600 Gbit/s
General	Physical layer Autonegotiation EtherType Flow control Frames Jumbos
Organizations	IEEE 802.3 Ethernet Alliance
Media	Fiber Twisted pair Coaxial First mile 10G-EPON
Historic	CSMA/CD StarLAN 10BROAD36 10BASE-FB 10BASE-FL 10BASE5 10BASE2 MAU FOIRL 100BaseVG LattisNet Long Reach
Applications	Audio Automotive Carrier Data center Energy Efficiency Industrial Metro Power Synchronous
Transceivers	GBIC SFP/SFP+/QSFP/QSFP+/OSFP XENPAK/X2 XFP CFP
Interfaces	AUI EAD MDI MII GMII XGMII XAUI
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See also

References