| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in which a period in which a USB device can stay in a low-power state becomes short when USB data transfer is intermittently generated, and therefore, power consumption becomes large in a USB host device side controller and a USB peripheral device.SOLUTION: In a USB peripheral device, timing of transmitting an ERDY TP is controlled in accordance with difference between a data processing rate and a data transfer rate to reduce the number of times of state transition, thereby enabling reduction of power consumption. |
