Abstract: A method for controlling refreshing of data in a dynamic memory unit comprising a refresh generator and a timer provides that during a time interval of, for example, 10-16 .mu.s between two successively following refresh cycles, a first memory cycle at the beginning of a first time interval of, for example, 10 .mu.s lying therein triggers a refresh cycle that is concluded in the pause between cycles before the possible leading edge of an earliest possible, next memory cycle. Each further memory cycle within the first time interval, which is clearly longer than the minimum duration of, for example, 1 .mu.s between the start times 2 memory cycles following immediately upon one another, subsequently triggers no further refresh cycle. After the beginning of the following, second time interval of, for example, 5 .mu.s, a next, x.sup.th memory cycle occurring within the second time interval triggers a next refresh cycle which is concluded before the possible start of an earliest possible, x+1.sup.