The OTIS Reference Manual - Hasylab

Figure 15: Recording of a data output sequence while operating in the multi hit mode. The
different header, hitmask and drift time sections are alternately greyed for the ease of orientation.
Figure 16: Recording of a data output sequence while operating in the multi hit mode. The four
header bytes are followed by 32 drift time bytes. Only the channels 13 and 25 show a valid hit
and drift time code.
28 to 45MHz in which the DLL reliably locks. For the chip temperature of 45 centigrade, which
the design is based upon, the locking frequencies range from 24 to 50MHz.
Data Output Sequences:
Figure 15 shows an exemplary recording of a data output sequence of the OTIS chip while operating
in the multi hit or plain hitmask mode. The visible section of the recording spans 50 clock cycles
and between the markers G1 and G2 the data from 36 clock cycles is shown. Next to the eight
data bits that are labeled from Data 0 (LSB) to Data 7 (MSB), the figure additionally presents
the DataValid signal plus the two service pad signals that are programmed to indicate start and
stop of any data transfer. While the service pads only provide signals for monitoring purposes,
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