The Guangpu gigabit module wiring follows standard Gigabit Ethernet pinouts using all four twisted pairs, typically via RJ45 connectors, with PHY-to-MAC connections for data transmission.

RJ45 Pinout and Cable Wiring

Gigabit Ethernet uses all eight wires (four twisted pairs) in Cat5e or Cat6 cables for simultaneous bi-directional data transmission . The standard wiring schemes are:

• T568A Standard:
  1. White/Green
  2. Green
  3. White/Orange
  4. Blue
  5. White/Blue
  6. Orange
  7. White/Brown
  8. Brown
• T568B Standard:
  1. White/Orange
  2. Orange
  3. White/Green
  4. Blue
  5. White/Blue
  6. Green
  7. White/Brown
  8. Brown Straight-through cables use the same standard on both ends, ideal for connecting a module to a switch or router. Crossover cables use T568A on one end and T568B on the other, useful for direct device-to-device connections .

PHY-to-MAC Wiring

At the module level, the PHY (Physical Layer) chip interfaces with the MAC (Media Access Control) layer via standard interfaces:

• MII (Media Independent Interface): Full-featured, supports 10/100/1000 Mbps, multiple signal lines including TX/RX data, clocks, and control signals.
• RMII (Reduced MII): Simplified, fewer pins, suitable for low-power or compact designs . Key connections include:
• TX+/TX- and RX+/RX- differential pairs from PHY to RJ45 port.
• Power supply: Typically 3.3V or 5V DC, with a ground (GND) connection.
• Control signals: Reset, clock, and link status pins as specified by the PHY datasheet .

Cable and Module Considerations

• Use Cat5e or Cat6 cables for reliable 1 Gbps operation; Cat6 supports up to 10 Gbps over short distances .
• Keep untwist lengths short (≤1 cm) at the connector to reduce crosstalk .
• Ensure secure RJ45 connections to maintain signal integrity and full gigabit speed .

Summary

To wire a Guangpu gigabit module:

1. Connect the module's PHY TX/RX pins to an RJ45 connector following T568A or T568B standards.
2. Provide stable power (3.3V/5V) and ground.
3. Interface the PHY to the MAC using MII or RMII as per the module datasheet.
4. Use Cat5e or Cat6 cables, ensuring proper termination and minimal untwist at the connector. Following these guidelines ensures full gigabit performance and reliable network operation for the Guangpu module .