Oscillator and electronic device
An oscillator includes a power supply terminal to which a high-potential-side power supply voltage is supplied, a ground terminal to which a low-potential-side power supply voltage is supplied, a clock terminal that outputs a clock signal, an output control terminal to which an output control signal of the clock signal is input, and a failure diagnosis terminal that outputs a failure diagnosis signal. The output control terminal receives the output control signal having a first logic which is one of a positive logic and a negative logic, and the failure diagnosis terminal outputs the failure diagnosis signal having a second logic which is the other one of the positive logic and the negative logic.
1 . An oscillator comprising:
a power supply terminal to which a high-potential-side power supply voltage is supplied;
a ground terminal to which a low-potential-side power supply voltage is supplied;
a clock terminal configured to output a clock signal;
an output control terminal to which an output control signal of the clock signal is input; and
a failure diagnosis terminal configured to output a failure diagnosis signal, wherein
the output control terminal is configured to receive the output control signal having a first logic which is one of a positive logic and a negative logic, and
the failure diagnosis terminal is configured to output the failure diagnosis signal having a second logic which is the other one of the positive logic and the negative logic.
2 . The oscillator according to claim 1 , wherein
the clock terminal
outputs the clock signal when the output control signal at a first level, which is one of a high level and a low level, is input to the output control terminal, and
does not output the clock signal when the output control signal at a second level, which is the other one of the high level and the low level, is input to the output control terminal, and
the failure diagnosis terminal
outputs the failure diagnosis signal at the first level or is set to a high impedance state when operating normally, and
outputs the failure diagnosis signal at the second level when a failure is detected.
3 . The oscillator according to claim 1 , wherein
the output control terminal and the failure diagnosis terminal are arranged side by side.
4 . The oscillator according to claim 1 , wherein
the output control terminal and the failure diagnosis terminal are arranged side by side along a first side of the oscillator.
5 . The oscillator according to claim 1 , wherein
a positive side clock terminal configured to output a positive side clock signal of a differential clock signal, which is the clock signal, and a negative side clock terminal configured to output a negative side clock signal of the differential clock signal are provided as the clock terminals,
the output control terminal, the failure diagnosis terminal, and the ground terminal are arranged in an order of the output control terminal, the failure diagnosis terminal, and the ground terminal along a first side of the oscillator, and
the power supply terminal, the negative side clock terminal, and the positive side clock terminal are arranged in an order of the power supply terminal, the negative side clock terminal, and the positive side clock terminal along a second side which is an opposite side of the first side of the oscillator.
6 . The oscillator according to claim 1 , further comprising:
a resonator; and
a circuit device, wherein
the circuit device includes
an oscillation circuit configured to oscillate the resonator,
an output circuit configured to output, to the clock terminal, the clock signal based on an oscillation clock signal from the oscillation circuit,
a control circuit to which the output control signal is input, and
a failure diagnosis circuit configured to perform failure diagnosis for generating the failure diagnosis signal.
7 . The oscillator according to claim 6 , further comprising:
a serial communication circuit, wherein
in a serial communication mode in which serial communication is performed by the serial communication circuit, a serial clock signal is input to the failure diagnosis terminal, and serial data is input or output via the output control terminal.
8 . The oscillator according to claim 7 , wherein
the serial communication by the serial communication circuit is communication of a standard detected as a clock stretch when the serial clock signal is at a low level for a given period.
9 . An electronic device comprising:
the oscillator according to claim 1 ; and
a circuit board to which the oscillator is installed.
10 . The electronic device according to claim 9 , further comprising:
a control device that is provided to the circuit board and includes a first terminal that outputs the output control signal and a second terminal to which the failure diagnosis signal is input, wherein
the circuit board includes
a first electrode electrically coupled to the first terminal of the control device,
a second electrode electrically coupled to the output control terminal of the oscillator, and
a third electrode electrically coupled to the failure diagnosis terminal of the oscillator and the second terminal of the control device.
11 . The electronic device according to claim 10 , wherein
the first electrode and the second electrode, or the third electrode and the second electrode are coupled to each other by a coupling element.
12 . The electronic device according to claim 10 , wherein
the circuit board includes a fourth electrode electrically coupled to one end of a resistor whose the other end is electrically coupled to a power supply node.
13 . The electronic device according to claim 12 , wherein
the first electrode and the second electrode, the third electrode and the second electrode, or the fourth electrode and the second electrode are coupled to each other by a coupling element.
14 . The electronic device according to claim 9 , wherein
the output control terminal and the failure diagnosis terminal are electrically coupled to each other at the circuit board.
15 . The electronic device according to claim 9 , wherein
the circuit board includes
a first resistor provided between the output control terminal and a power supply node, and
a second resistor provided between the failure diagnosis terminal and the power supply node.