Single-pin input readout circuit assembly and readout circuit

The invention discloses a single-pin input readout circuit assembly and a readout circuit. The single-pin input readout circuit assembly comprises: a counting module configured to execute counting based on a reset signal and output a counting stop signal under the condition that the counting is finished; a trigger module configured to output a data validity indication signal before the counting stop signal is received and under the condition that a specified identifier of the serial input data is received; and a serial-parallel conversion module configured to receive the serial input data and a default value, select the serial input data as effective input and execute parallel conversion under the condition that the data effective indication signal is received, and select the default value as effective input under the condition that the data effective indication signal is not received. According to the readout circuit disclosed by the invention, the writing of a plurality of control words can be controlled by