INTERCONNECT SHARING WITH INTEGRATED CONTROL FOR REDUCED PINOUT

摘要

A method and apparatus provide an ability to selectively couple one of the output of the buffer or the output of the digital driver to a data terminal based upon a state of a storage location in which a stored first select indicator is stored and based upon a state of a selection signal. An external serial interface, at a semiconductor die, includes the data terminal, a selection terminal to receive the selection signal, and a clock terminal to receive a clock signal. A buffer includes an input to receive a secondary signal and an output to provide the secondary signal to the data terminal. A digital driver includes a digital output coupled to the data terminal. A first storage location has a storage state based upon the stored first select indicator. Select circuitry provides the selectively coupling.

主权项

1. A device comprising:
an external serial interface, at a semiconductor die, including a data terminal, a selection terminal to receive a selection signal that selects the device to communicate via the external serial interface, and a clock terminal to receive a clock signal that indicates when digital information is to be provided to the data terminal; a buffer of the semiconductor die including an input to receive a secondary signal, and an output to provide the secondary signal to the data terminal; a digital driver of the semiconductor die including a digital output coupled to the data terminal; a first storage location of the semiconductor die to have a storage state based upon a stored first select indicator; and select circuitry of the semiconductor die to selectively couple one of the output of the buffer or the output of the digital driver to the data terminal based upon a state of a storage location in which the stored first select indicator is stored and based upon a state of the selection signal.