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US 10,853,305 B2Granted
Method of communication for master device and slave device on synchronous data bus wherein master and slave devices are coupled in parallel
AssigneeSTMicroelectronics (Grand Ouest) SAS
InventorThierry Biniguer
Life of this patent
Estimating the term…
Abstract
Some embodiments include a method of communication between a master device and N slave devices on a synchronous data bus. The method includes selecting a slave device from among the N slave devices using a selection channel, where the master device and the N slave devices are coupled in series through the selection channel. The method also includes transmitting data between the master device and the selected slave device using a transmission channel, where the master device and the N slave devices are coupled in parallel through the transmission channel.
Claims20
A device comprising:
- a bus interface of the serial peripheral interface bus (SPI) type, the bus interface comprising:
- a clock terminal configured to be coupled to a clock line,
- a master-output-slave-input (MOSI) node,
- a master-input-slave-output (MISO) terminal configured to be coupled in parallel to N slave devices, wherein N is a positive integer greater than 1, and
- a mode selection terminal configured to be coupled in parallel to the N slave devices;
- a first MOSI terminal configured to be coupled in series to the N slave devices;
- a second MOSI terminal configured to be coupled to be coupled in parallel to the N slave devices;
- and
- an output-input switch coupled between the MOSI node and the first and second MOSI terminals, wherein the output-input switch is configured to link the MOSI node to one or the other of the first and second MOSI terminals.
6 more elements
A device comprising:
- a bus interface of the serial peripheral interface bus (SPI) type, the bus interface comprising:
- a clock terminal configured to receive a clock signal from a master device,
- a master-output-slave-input (MOSI) node,
- a master-input-slave-output (MISO) node, and
- a mode selection terminal configured to place the device in serial mode or parallel mode;
- a first MOSI terminal configured to be coupled to the master device;
- a second MOSI terminal configured to be coupled to the master device and to N−1 slave devices, wherein N is a positive integer greater than 1;
- an output-input switch coupled between the MOSI node and the first and second MOSI terminals, wherein the output-input switch is configured to link the MOSI node to one or the other of the first and second MOSI terminals;
- a first MISO terminal configured to be coupled to a slave device of the N−1 slave devices;
- a second MISO terminal configured to be coupled to the master device and to the N−1 slave devices;
- and
- an input-output switch coupled between the MISO node and the first and second MISO terminals, wherein the input-output switch is configured to link the MISO node to one or the other of the first and second MISO terminals.
9 more elements
A device configured to be coupled to a synchronous data bus, the device comprising:
- a clock terminal configured to be coupled to a clock line,
- a master-output-slave-input (MOSI) node,
- a master-input-slave-output (MISO) terminal configured to be coupled in parallel to N slave devices, wherein N is a positive integer greater than 1, and
- a mode selection terminal configured to be coupled in parallel to the N slave devices;
- a first MOSI terminal configured to be coupled in series to the N slave devices;
- a second MOSI terminal configured to be coupled to be coupled in parallel to the N slave devices;
- and
- an output-input switch coupled between the MOSI node and the first and second MOSI terminals, wherein the output-input switch is configured to link the MOSI node to one or the other of the first and second MOSI terminals, and wherein the device is configured to:
- select a slave device from among the N slave devices using the first MOSI terminal when the mode selection terminal is in a first state, and
- transmit data to the selected slave device using the second MOSI terminal when the mode selection terminal is in a second state different from the first state.
7 more elements
Dependencies are inferred from the claim text.