SATA Features

SATA interface architecture
In combination with the SATA 2.5 protocol standard, the SATA interface is divided into four layers to achieve: physical layer, link layer, transmission layer and application layer. As shown in Figure 1, the SAS interface architecture diagram

SATA interface physical characteristics
The SATA interface is a new computer hard disk interface. In terms of the physical characteristics of the interface, it completely overturns the parallel interface mode of SATA. The interface is divided into two parts: signal and power supply. As shown in Figure 1, the SATA physical interface schematic diagram (a) is the connector of the signal part of the hard disk device, (b) is the power supply part connected to the machine, (c) and (d) are respectively the signal and power supply connectors of the cable part, (e) is the cable connector of the host part, (f) and (g) are the schematic diagrams of the connection between the cable and the socket.

The signal part of the serial SATA interface consists of 7 cables. Among them, 3 are ground wires, which can weaken and eliminate interference between the serial cables. The other 4 are differential signal lines connected in pairs, serving the functions of transmission and reception. The power supply part has a total of 15 cables, providing 3.3V, 5V, and 12V power. For example, the cable pinout diagram.