Switching control circuit provided with serial to parallel converter and storage unit, and radio communication apparatus using the same
View Patent ↗A switching control circuit includes a serial-to-parallel converter, a rewritable storage device, and a decoder. The serial-to-parallel converter performs serial-to-parallel conversion for converting an inputted first control signal into a first parallel signal, and outputs the first parallel signal. The rewritable storage device has a write mode and a read mode selectively switched over in response to a storage mode switching signal, stores therein data of the first parallel signal in the write mode, and outputs the stored data as a second parallel signal in the read mode. In the read mode, the decoder decodes the first control signal and the second parallel signal to generate and output a plurality of element control signals to a plurality of elements, respectively. In the write mode, the decoder holds the plurality of element control signals generated in the read mode.
1. A switching control circuit for controlling operations of a plurality of elements, said switching control circuit comprising:
a serial-to-parallel converter for performing serial-to-parallel conversion for converting a first control signal into a first parallel signal, and outputting the first parallel signal;
a rewritable storage device having a write mode and a read mode selectively switched over in response to a storage mode switching signal, storing therein data of the first parallel signal in the write mode, and outputting the stored data as a second parallel signal in the read mode;
a decoder for executing the following according to the write mode or the read mode of said rewritable storage device:
in the read mode, said decoder decoding the first control signal and the second parallel signal so as to generate and output a plurality of element control signals to said plurality of elements, respectively, and
in the write mode, said decoder holding the plurality of element control signals generated in the read mode; and
a switch circuit for selectively outputting, in response to the storage mode switching signal, the first control signal to either said serial-to-parallel converter or said decoder.
2. The switching control circuit as claimed in claim 1 ,
wherein said switching control circuit has an address,
wherein the first control signal includes an address, and
wherein the serial-to-parallel converter performs the serial-to-parallel conversion only when the address included in the first control signal coincides with the address of said switching control circuit.
3. The switching control circuit as claimed in claim 1 , further comprising an output holding circuit for generating a memory holding signal and a decoder output holding signal based on the storage mode switching signal, the first control signal and a second control signal, outputting the memory holding signal to said rewritable storage device, and outputting the decoder output holding signal to said decoder,
wherein said rewritable storage device further has a memory holding mode,
wherein the write mode, the read mode and the memory holding mode are selectively switched over in response to the storage mode switching signal and the memory holding signal,
wherein, in the memory holding mode, said rewritable storage device holds the data stored in the write mode, and
wherein, in the memory holding mode, said decoder holds the plurality of element control signals based on the decoder output holding signal.
4. The switching control circuit as claimed in claim 1 ,
wherein the rewritable storage device is a ferroelectric random access memory.
5. A radio communication apparatus for transmitting and receiving a predetermined radio signal, said radio communication apparatus comprising at least one switching control circuit for controlling operations of a plurality of elements,
wherein said switching control circuit comprises:
a serial-to-parallel converter for performing serial-to-parallel conversion for converting a first control signal into a first parallel signal, and outputting the first parallel signal;
a rewritable storage device having a write mode and a read mode selectively switched over in response to a storage mode switching signal, storing therein data of the first parallel signal in the write mode, and outputting stored data as a second parallel signal in the read mode;
a decoder for executing the following according to the write mode or the read mode of said rewritable storage device:
in the read mode, said decoder decoding the first control signal and the second parallel signal so as to generate and output a plurality of element control signals to said plurality of elements, respectively, and
in the write mode, said decoder holding the plurality of element control signals generated in the read mode; and
a switch circuit for selectively outputting, in response to the storage mode switching signal, the first control signal to either said serial-to-parallel converter or said decoder.
6. The radio communication apparatus as claimed in claim 5 , further comprising at least one circuit of an antenna switching circuit, a demodulator circuit, and a modulator circuit,
wherein said switching control circuit is provided in each of said antenna switching circuit, said demodulator circuit, and said modulator circuit, and
wherein said switching control circuit controls the operations of said plurality of elements provided therein based on the storage mode switching signal and the first control signal.
7. A radio communication apparatus for transmitting and receiving a predetermined radio signal, said radio communication apparatus comprising a plurality of switching control circuits, each of said switching control circuits controlling operations of a plurality of elements, respectively,
wherein a first control signal includes an address,
wherein each of said switching control circuits has an address, and
wherein each of said switching control circuits comprises:
a serial-to-parallel converter for performing serial-to-parallel conversion for converting the first control signal into a first parallel signal, and outputting the first parallel signal, only when the address included in the first control signal coincides with the address of said switching control circuit;
a rewritable storage device having a write mode and a read mode selectively switched over in response to a storage mode switching signal, storing therein data of the first parallel signal in the write mode, and outputting stored data as a second parallel signal in the read mode;
a decoder for executing the following according to the write mode or the read mode of said rewritable storage device:
in the read mode, said decoder decoding the first control signal and the second parallel signal so as to generate and output a plurality of element control signals to said plurality of elements, respectively, and
in the write mode, said decoder holding the plurality of element control signals generated in the read mode; and
a switch circuit for selectively outputting, in response to the storage mode switching signal, the first control signal to either said serial-to-parallel converter or said decoder.
8. The radio communication apparatus as claimed in claim 7 ,
wherein the radio communication apparatus comprises a plurality of circuits selected among an antenna switching circuit, a demodulator circuit, and a modulator circuit,
wherein said plurality of switching control circuits are provided in said plurality of selected circuits, respectively, and
wherein each of said switching control circuits controls the operations of said plurality of elements provided therein based on the storage mode switching signal and the first control signal.