A memory circuit includes a memory cell configured to be re-writable. A write enable circuit is configured to enable writing a signal via a pair of bit lines to the memory cell depending on a write signal. A charge supply circuit is configured to supply a charge to at least one of the pair of bit lines. A charge supply controller is configured to control the charge supply circuit to supply the charge dependent on at least one of the temperature of the memory circuit and the potential difference supply of the memory circuit.