Final answer:
The SATA interface specification defines a data cable connector with 7 pins for data and another connector with 15 pins for power.
Step-by-step explanation:
The SATA interface specification defines a data cable connector consisting of 7 pins for the data connection and 15 pins for the power connection. When connecting a device like a hard drive or SSD to a motherboard, the 7-pin connector is used for data transfer, while the 15-pin connector provides the necessary power supply to the device.