Patent ID: 8762748

Claim:
A method comprising: measuring, at a first device, a bus clock period, wherein the bus clock period corresponds to a wired communication bus connecting the first device to a second device; determining, at the first device, a first time period in which the first device is to enter a first reduced power mode; determining, at the first device, a second time period in which the wired communication bus is to enter a second reduced power mode, wherein the second time period is based on i) the first time period and ii) the bus clock period; sending, via the wired communication bus, a request from the first device to the second device, wherein the request is for the wired communication bus to enter the second reduced power mode during the second time period; and causing, at the first device, the first device to enter the first reduced power mode during the first time period in response to the first device receiving a reply to the request, wherein the reply is received from the second device via the wired communication bus.