Back to results
US 2021/0242834 A1Published application
Microcontroller comprising oscillators that are configured to receive external resonator signals
AssigneeSTMicroelectronics (Rousset) SAS
InventorsArnaud GAMET, Philippe LE FEVRE
Life of this patent
Estimating the term…
Abstract
A shared pair of input/output cells configured to be able to be connected to a first external resonator or a second external resonator. A first oscillator and a second oscillator are coupled to the shared pair input/output cells by a switching circuit. The switching circuit is configured to be able to connect either the first oscillator or the second oscillator to the pair of input/output cells.
Claims21
A microcontroller, comprising:
- a plurality of pairs of input/output cells;
- wherein said plurality includes at least one shared pair of input/output cells;
- a first oscillator;
- a second oscillator;
- a switching circuit coupled between said at least one shared pair of input/output cells and the first and second oscillators, wherein the switching circuit is configured to be able to connect either the first oscillator or the second oscillator to the shared pair of input/output cells;
- wherein said shared pair of input/output cells is configured to be able to be connected to a first external resonator in connection with the switching circuit connecting the second oscillator to the shared pair of input/output cells;
- and
- wherein said shared pair of input/output cells is configured to be able to be connected to a second external resonator in connection with the switching circuit connecting the second oscillator to the shared pair of input/output cells.
5 more elements
A microcontroller, comprising:
- an output cell;
- an input cell;
- a first oscillator;
- a second oscillator;
- a switching circuit coupled between the first and second oscillators and the input cell and the output cell;
- wherein said switching circuit is configured to, in a first switched configuration, selectively connect the first oscillator to the input cell and output cell and, in a second switched configuration, selectively connect the second oscillator to the input cell and output cell;
- wherein the input cell and output cell are configured to support connection to an external resonator.
4 more elements
The microcontroller according to claim 17, wherein the feedback path includes an amplifier.
Dependencies are inferred from the claim text.