TDC-GP2 acam messelectronic gmbh, TDC-GP2 Datasheet - Page 16

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

21
Reg4
0-18
Reg5
0-15
16-18
19
20
21-23
2.6.2 Read registers / Output data format
ADR
0
1
2
3
4
5
The data structure and the occupancy of the result registers depends on the operation mode and whether calibrated or
non-calibrated data are stored. Several cases must be distinguished:
twice the period of the calibration clock. When measuring bigger time intervals an ALU - overflow will occur and
0xFFFFFFFF is written in the appropriate result register.
Only in measurement range 1 negative results are possible.
In measurement range 2 only positive results are possible, given as unsigned numbers.
A non-calibrated measurement is only possible in measurement range 1.
In measurement range 1 with calibrated data (ALU) the time intervals that have to be measured can not exceed
Symbol
RES_0
RES_1
RES_2
RES_3
STAT
REG_1
EN_ERR_VAL
DELVAL3
PHASE_FIRE
REPEAT_FIRE
DIS_PHASENOISE
EN_STARTNOISE
CONF_FIRE
acam-messelectronic gmbh - Am Hasenbiel 27 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de
Bits
32
32
32
32
16
8
Description
Measurement result 1, fixed-point number with 16 integer and 16 fractional digits
2
Measurement result 2, fixed-point number with 16 integer and 16 fractional digits
Measurement result 3, fixed-point number with 16 integer and 16 fractional digits
Measurement result 4, fixed-point number with 16 integer and 16 fractional digits
n.c.
Content of highest 8 Bits of write register 1, to be used for testing the communication
15 - 13
1 5
Timeout forces ALU to write
0xFFFFFFFF into the output
register
Delay value for internal stop
enable unit, hit 3 channel 1. Fixed
point number with 14 integer and
5 fractional digits in multiples of
Tref
Enables phase reversing for each
pulse of a sequence of up to 15
possible pulses
Number of pulse sequnce
repetition for "quasi-sing-
arround"
Phase noise unit, has to be
disabled, See bug report section
7.2
Enables additional noise for start
channel
Output configuration for pulse
generator
Error
short
12
Error
open
11
16
Timeout
Precounter
10
2
0
,2
0 = disabled
1 = enabled
DELVAL1 = 0 to 16383.96875
0 = no inversion
1 = inversion
0 = no signal repetition
1 = 1 signal repetition
2 = 2 signal repetition
...
7 = 7 signal repetition
1 = disable phase shift
Setting 1 is mandatory
1 = switch on noise unit
Bit 23 = 1: negate output Fire2
Bit 22 = 1: disable output Fire2
Bit 21 = 1: disable output Fire!
- 1
Timeout
TDC
9
# of hits
Ch2
8 - 6
2.6 Regi ster setti ngs
TDC-GP2
# of hits
Ch1
5 - 3
Pointer
result
register
2 - 0
2
- 1 6