TDC-GPX acam messelectronic gmbh, TDC-GPX Datasheet - Page 43

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

4.12 Measurement Flow
In the following we shows a typical example of register settings and measurement flow in R-Mode.
Task1: Typical application spectroscopy or testing.
Given a Start signal with 1 MHz rate. To each Start there is one Stop event on channel 1. The time between Stop
and Start shall be measured with high resolution, using the LVTTL inputs.
Choice: R-Mode with Start retrigger, using the Fill level flags.
//****** R-Mode, Stop against Start **********
PuResN=Low;
PuResN=High;
StopDis1
StopDis2
StopDis3
StopDis4
_oupd( 0,0x000009F);
_oupd( 1,0x0620620);
_oupd( 2,0x0062004);
_oupd( 3,0x8000000);
_oupd( 4,0x2000000);
_oupd( 5,0x80004DA);
_oupd( 6,0x00000C8);
_oupd( 7,0x0001FB4);
_oupd(11,0x7FF0000);
_oupd(12,0x0000000);
_oupd(14,0x0000000);
_oupd( 4,0x2400001);
StopDis1
StopDis2
StopDis3
StopDis4
do
{
} while(!quit)
if
{
}
for (i=0;i<200,I++)
{
}
(LF1=High)
data = _inpd(8);
Time = (data & 0x7FFFFF)-3*0x4DA;
Printf(Time);
acam-messelectronic gmbh - Am Hasenbiel 27 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de
= High;
= High;
= High;
= High;
= Low;
= Low;
= Low;
= Low;
// Power-up reset
// Disable inputs
// write configuration registers:
// Rising and falling edges, Start ringoscil.
// Channel adjust = 6 & 2
// R-Mode, channel adjust = 6 & 2
// Use LVTTL inpus
// EFlagHiZN
// StartOff1 = 100ns, StartRetrigger
// Fill = 200
// Res = 27.4348ps
// Any error -> ErrFlag
// No IrFlag
// Master reset
// Enable inputs
43
// Fill level=200 IFIFO1 reached?
// Read 200 times
// Read IFIFO1
// Get time Stop-Start
TDC-GPX