Dual mode power amplifier control interface with a two-mode general purpose input/output interface

摘要

In accordance with some embodiments, the present disclosure relates to a dual mode control interface that can be used to provide both a radio frequency front end (RFFE) serial interface and a two-mode general purpose input/output (GPIO) interface within a single digital control interface die. In certain embodiments, the dual mode control interface, or digital control interface, can communicate with a power amplifier. Further, the dual mode control interface can be used to set the mode of the power amplifier.

主权项

1. A digital control interface comprising:
a voltage input/output (VIO) pin configured to receive a VIO signal; a front end core configured to provide a serial interface, the front end core in an active state when the VIO signal satisfies a first logic level and in an inactive state when the VIO signal satisfies a second logic level, the digital control interface configured to provide a general purpose input/output (GPIO) interface when the front end core is set to the inactive state; a combinational logic block configured to provide an enable signal to an enable level shifter and a mode signal to a mode level shifter; a clock/mode pin configured to provide a clock signal to the front end core when the front end core is set to an active state and a mode signal to the combinational logic block when the front end core is set to an inactive state; a data/enable pin configured to provide a data signal to the front end core when the front end core is set to an active state and an enable signal to the combinational logic block when the front end core is set to an inactive state; and a power on reset block configured to select, based on the VIO signal, a source of the enable signal and the mode signal provided to the enable level shifter and the mode level shifter respectively.