ZQ Calibration is related to the data pins DQ. To understand what ZQ calibration does and why it is required, we need to first look at the circuit behind each DQ pin. Remember, the DQ pin is bidirectional. It is responsible for sending data back during reads and receiving data during writes.
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The committee stressed that it "must both remember and praise all BBC staff working in countries in which they and their families may be at risk of imprisonment or worse".