TDC-GPX datasheet(45/54 Pages) AMSCO

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TDC-GPX

acam-messelectronic gmbh - Am Hasenbiel 27 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de

Task2: Typical application laser rangefinder

Given a Start signal with 10 kHz rate. To each Start there is an unknown number of Stops on channel 1. The

maximum range is 1 µs. The time between Stop and Start shall be measured with very high resolution, using the

LVPECL inputs.

Choice: R-Mode with quiet mode and internal Timer.

//****** R-Mode, Stop against Start **********

PuResN=Low;

// Power-up reset

PuResN=High;

StopDis1 = High;

// Disable inputs

StopDis2 = High;

StopDis3 = High;

StopDis4 = High;

// write configuration registers:

_oupd( 0,0x000009F);

// Rising and falling edges, Start ringoscil.

_oupd( 1,0x0620620);

// Channel adjust = 6 & 2

_oupd( 2,0x0062004);

// G-Mode, channel adjust = 6 & 2

_oupd( 3,0x0000000);

// Use LVPECL inpus

_oupd( 4,0x6000100);

// EFlagHiZN, Quiet mode, Mtimer on Start

_oupd( 5,0x00004DA);

// StartOff1 = 100ns

_oupd( 6,0x8000000);

// Power-on ECL

_oupd( 7,0x0141FB4);

// Res = 27.4348ps, Mtimer = 1 µs

_oupd(11,0x7FF0000);

// Any error -> ErrFlag

_oupd(12,0x2000000);

// Mtimer -> Interrupt flag

_oupd(14,0x0000000);

_oupd( 4,0x6400100);

// Master reset

StopDis1 = Low;

// Enable inputs

StopDis2 = Low;

StopDis3 = Low;

StopDis4 = Low;

{

while(IrFlag=Low);

// Check interrupt flag

Alutrigger = High;

// Trigger Alu

Alutrigger = Low;

wait(100ns);

// Time to calculate first hit

while(EF1=Low)

// Check empty flag

{

data = _inpd(8);

// Read IFIFO1

Time = (data & 0x7FFFFF);

// Get time Stop-Start

Printf(Time);

}

_oupd( 4,0x6400100);

// Master reset

} while(!quit)

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