Abstract: Circuits and methods enabling common control of an agent device by two or more buses, particularly MIPI RFFE serial buses. In essence, the invention provides flagging signals designating completed register write operations to denote which of two registers are active, such that synchronization is accomplished in a clock-free manner. One embodiment includes at least two decoders, each including a common register and a bus (S/P) decoder coupled to a respective bus and to the common register. The S/P decoder asserts a write-complete signal when a write operation to a corresponding common register is completed. A multiplexer has at least two selectable input bus ports coupled to the common registers within the at least two decoders. A selection circuit selects an input bus port of the multiplexer in response to the assertion of a last write-complete signal from the S/P decoders.

Abstract: Circuits and methods enabling common control of an agent device by two or more buses, particularly MIPI RFFE serial buses. In essence, the invention provides flagging signals designating completed register write operations to denote which of two registers are active, such that synchronization is accomplished in a clock-free manner. One embodiment includes at least two decoders, each including a common register and a bus (S/P) decoder coupled to a respective bus and to the common register. The S/P decoder asserts a write-complete signal when a write operation to a corresponding common register is completed. A multiplexer has at least two selectable input bus ports coupled to the common registers within the at least two decoders. A selection circuit selects an input bus port of the multiplexer in response to the assertion of a last write-complete signal from the S/P decoders.

Abstract: Methods and apparatus for adding an autonomous controller to an existing architecture such as by way of example, portable devices such as cell phones, MP3 players, and digital cameras. A circuit interposed between the memory card and the system controller of the device is controllable to couple the memory card to the system controller, or to couple the memory card to a high speed I/O controller on the circuit. When the memory card is coupled to the high speed I/O controller on the circuit, the circuit provides signals to the system controller indicative of a memory card removal event. In systems having an I/O connection such as a USB connection, the circuit also disconnects that connection from the system controller, provides signals to the system control indicative of a USB disconnect and connects the I/O connection to the memory card through a high speed data transfer unit to provide a higher speed I/O capability. Various features and capabilities are disclosed.

Abstract: A USB to PCI bridge preferably includes a USB interface, a PCI interface, and an on-board processor configured to manage data flow between the interfaces. Firmware is preferably provided and configured to translate signals between the USB and PCI interfaces. The bridge can also include an internal memory configured to store instructions and data. A PCI central resource can be provided to enable hosting of a PCI subsystem. In a preferred embodiment, a plurality of PCI targets can be connected to a USB port through the bridge.

Abstract: A circuit comprising a storage circuit and a control circuit. The storage circuit may be configured to store one or more message frames received from a first bus and a second bus in one or more memory locations in response to one or more signals. The control circuit may be configured to store and access the one or more signals, wherein the signals are presented to the storage circuit through the first or the second bus such that management overhead of the first or second bus is reduced.

Abstract: A circuit comprising a storage circuit and a control circuit. The storage circuit may be configured to store one or more message frames received from a first bus and a second bus in one or more memory locations in response to one or more signals. The control circuit may be configured to store and access the one or more signals, wherein the signals are presented to the storage circuit through the first or the second bus such that management overhead of the first or second bus is reduced.