Clockless serial slave device

摘要

Various methods and devices involving a slave device are discussed. The slave device, which may be without a clock input, receives a clock message and generates a clock based on the received clock message. In some embodiments, the slave device receives a further clock message and transmits a confirmation message simultaneously with receiving the further clock message. In other embodiments, determining a clock may comprise sampling the clock message with an internal system clock and providing the clock based on located edges. Other techniques are also discussed.

主权项

1. An apparatus, comprising:
a slave device, the slave device comprising a serial data input, a serial data output and a clock recovery engine, wherein the serial data input is configured to receive a first clock message, wherein the clock recovery engine is configured to recover a clock based on the first clock message, wherein the serial data input is configured to receive a second clock message after receipt of the first clock message, wherein the serial data output is configured to output a clock recovery confirmation upon receipt of the second clock message, and wherein the slave device is configured to utilize the recovered clock for at least one of receiving and transmitting data, while a clock message is not being received.