1 Introduction

RGMII as an example of a high-bandwidth data bus protocol typically communicates with very stringent timing considerations, interfaced between Ethernet Modules such as Media Access Control devices (MAC) / Microcontroller unit (MCU) and Ethernet Physical Layers (PHYs) as shown in Figure 1-2, with aggregate bandwidth as high as 1000Mbps.

RGMII as a communication protocol can be found in many applications that sends data over Ethernet, widely used in industrial, telecommunication and automotive sectors. Figure 1-1 illustrates typical example for transferring data over Ethernet using RGMII. Once all video and audio data are processed, the video and audio data are sent from the MAC or MCU to the PHY where they are serialized and sent over Ethernet.

TXV level shifters are used to bridge voltage mismatch, enabling communication, and further supporting the required timing considerations in RGMII applications.

Figure 1-1 Automotive Example for Data Over Ethernet Using RGMII

Table 3-5 highlights RGMII timing considerations. For more information, see Supporting Time and Skew Sensitive Interfaces with TI's TXV Level-Shifter Portfolio, application brief.

Figure 1-2 TXV0108 Typical Application