Data storage unit

Claim 1

A data storage unit having timing control means for producing internal timing signals for the unit on a plurality of timing signal lines, the timing control means comprising: (a) a writable control memory having a plurality of individually addressed locations, each location containing a word having a plurality of bits each bit corresponding respectively to each of said plurality of timing signal lines, (b) means for generating a sequence of clock signals, (c) means responsive to the sequence of clock signals for addressing the locations of the control memory sequentially to read out the words from successive locations in successive clock signals, (d) means connected to said clock signals generating means for producing a plurality of further clock signals sub-dividing each of said clock signal into a plurality of sub-clock signals, (e) means connected to said further clock signals producing means for selecting one of the further clock signals for each timing signal line, and (f) gating means responsive to the selected further clock signals and to each word out of the control memory, for producing a timing signal on each said timing signal line whenever the corresponding bit of the word read out of the control memory is set to a predetermined value.