The galvanic cell according to the invention comprises at least one current conductor and a casing. The modular roof has at least two modular roof elements which are fixed directly to the roof structure. Methods for making and using the coatings are also disclosed. The total sum of amounts of currents thus measured is compared with a normal value of a total sum of amounts of currents which are measured in a non-defective sample which is used instead of the semiconductor integrated circuit and is verified in advance to normally operate. The third pin is configured to transfer serial control information from the first hardware component to the second hardware component during both the read operation and the write operation. 25 Gbps with bit error rates of less than 1010.