Detection circuits, detection method, and electronic systems for I/O output status

An electronic system, comprising:

• an I/O interface circuit;
• and
• a detection circuit for an I/O output status of the I/O interface circuit, the detection circuit comprising:
• a comparison-window generating circuit, configured to:
• detect an I/O data signal, wherein the I/O data signal is outputted via the I/O interface circuit as an I/O drive signal,
• generate a first single pulse signal in response to a rising edge of the I/O data signal, the first single pulse signal determining a first-time window and being delayed with respect to the rising edge of the I/O data signal, and
• generate a second single pulse signal in response to a falling edge of the I/O data signal, the second single pulse signal determining a second-time window and being delayed with respect to the falling edge of the I/O data signal;
• a first comparison circuit, configured to:
• receive the first single pulse signal, and
• compare the I/O drive signal with a preset high-level reference signal within the first time window to obtain a first comparison result;
• and
• a second comparison circuit, configured to:
• receive the second single pulse signal, and
• compare the I/O drive signal with a preset low-level reference signal within the second time window to obtain a second comparison result,
• wherein the low level reference signal has an amplitude smaller than the high level reference signal, and the first comparison result and the second comparison result indicate a status of the I/O driving signal.

A method for detecting an I/O output status, comprising:

• detecting an I/O data signal, wherein the I/O data signal is outputted via an I/O interface circuit as an I/O drive signal, generating a first single pulse signal in response to a rising edge of the I/O data signal, the first single pulse signal determining a first-time window and being delayed with respect to the rising edge of the I/O data signal, and generating a second single pulse signal in response to a falling edge of the I/O data signal, the second single pulse signal determining a second-time window and being delayed with respect to the falling edge of the I/O data signal;
• comparing the I/O drive signal with a preset high-level reference signal within the first time window to obtain a first comparison result;
• and
• comparing the I/O drive signal with a preset low-level reference signal within the second time window to obtain a second comparison result, wherein the low level reference signal has an amplitude smaller than the high level reference signal, and the first comparison result and the second comparison result indicate a status of the I/O driving signal.