TDC-GP2 acam messelectronic gmbh, TDC-GP2 Datasheet - Page 31

• Manufacturer Part Number: TDC-GP2
• Description: Precision Time Interval Measurement
• Manufacturer: acam messelectronic gmbh

of the addressed register to SO output. Each positive
edge transfers the next lower Bit to the output.
5.5 Fast Initialization
In measurement range 1 the TDC-GP2 offers the
possibility of a fast initialization. Activated by setting
register 1, Bit 15, EN_FAST_INIT = "1" the interrupt
flag automatically initializes the TDC. So the TDC is
already prepared for the next measurement while the
data can be read out. This mode is for highest speed
applications only. It is most reasonable for un-
calibrated measurements with only one stop.
5.6 Noise Unit
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In case the user wants to improve the measuring
results by averaging it is necessary that the values do
not always display exactly the same time difference.
Instead the user should provide some 'noise' so that
different quantization steps of the characteristic curve
of the TDC are involved. This can not happen with very
constant time differences. One would constantly hit the
same LSB.
The noise unit enables the use of weighted averaging
even for constant time differences. The noise unit adds
a random offset to the start. It is dedicated to
applications where the TDC gets a dummy start and
measures the time difference between STOP1 and
STOP2 (e.g. laser range finders).
The noise unit is switched on by setting register 5, Bit
20, EN_STARTNOISE = "1"
5.5 Fast Initialization
TDC-GP2