METHOD AND APPARATUS FOR REGISTER SETTING VIA MULTIPLEXED CHIP CONTACTS

摘要

A method and apparatus for setting an internal register of an integrated circuit (IC) via a multiplexed pin which also passes an RF signal is provided. An internal RF signal path couples the pin to an internal terminal for the RF signal, and a register setting signal path couples the pin to an internal register. The internal register may be an address register, such as a USID address register of a MIPI RFFE bus. A capacitor on the RF signal path may block the constant voltage, and a resistor or inductor on the register setting signal path may block the RF signal. The integrated circuit may include an RF section and a controller section, where the controller section may be used to control the RF section. The controller section is responsive to an address associated with the address register.

主权项

1. An integrated circuit apparatus comprising:
a) a pin configured for coupling to both of:
i) an external radiofrequency (RF) terminal for supplying or receiving an RF signal; andii) a source of a constant voltage for setting an internal register of the integrated circuit apparatus; b) a radiofrequency (RF) signal path configured to couple the pin to an internal terminal for the RF signal; and c) a register setting signal path configured to couple the pin to the internal register.