TDC-GP2 acam messelectronic gmbh, TDC-GP2 Datasheet - Page 33

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

6.1.2 Configuration
A typical configuration could look like:
23
22
21
20
19
18
17
16
15
14
13
12
11
10
- All inputs are set to rising edges
- Measurement range 2 is used with Auto-calibration.
- The temperature measurement uses the high-speed clock with 128µs cycle time and 2 fake measurements on 4 ports
(2 sensors, for cold and hot water)
- The high-speed clock is switched on only for the time measurement with 640µs delay
- The 4 MHz high-speed clock is used without a divider
- The 4 MHz clock calibration is based on 8 periods of the 32.768 kHz clock (244.14 µs)
- For the fire-pulse generation the 4 MHz is internally doubled and the divided by 4 making 1 MHz. The generator sends
3 pulses
- The first stop is accepted after 50 µs, the second one after 51 µs and the third one after 52 µs.
- The TDC is set to measure 3 hits on STOP1.
- The ALU is set to calculate first Hit1 – Start
- All interrupt options are activated, timeout will be given after 1024 µs
- Phase-shifting is active
9 PORT#
8 Tcycle
7 Fake#
6 SelClk
5 Calibrate
4 DisAutoCal
3 MRange2
2 NEG_STOP2
1 NEG_STOP1
0 NEG_START
Description
FIRE#
DIV_FIRE
CalRes#
ClkHSDiv
START_CLKHS
acam-messelectronic gmbh - Am Hasenbiel 27 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de
Register 0
0x338A78
Value
150µs
ClkHS
rise
rise
rise
on
off
on
3
3
8
0
2
4
2
x
0
0
1
1
0
0
1
1
1
0
0
0
1
0
1
0
0
1
1
0
1
0
0
0
h
3
3
8
A
6
8
Description
HIT2
Hit1
EN_FAST_INIT
s.c.
HITIN2
HITIN1
n.c.
n.c.
n.c.
n.c.
n.c.
n.c.
n.c.
n.c.
Register 1
0x214400
Value
Stop1
Start
off
0
4
x
0
0
1
0
0
0
0
1
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
0
33
h
2
1
4
4
0
0
Description
EN_INT
RFEDGE2
RFEDGE1
DELVAL1
Register 2
0xE03200
Value
rise or fall
rise or fall
Timeout
End hits
ALU
400
x
1
1
1
0
0
0
0
0
0 3
0
1
1
0
0
1
0
0
0
0
0
0
0
0
0
h
E
0
2
0
0
6.1 Ul trasoni c He atm e te r
s.c.
s.c.
EN_ERR_VAL
SEL_TIMO_MB2
DELVAL2
Description
TDC-GP2
Register 3
0x083300
Value
1024µs
408
off
x h
0
0
0
0
1
0
0
0
0
0
1
1
0
0
1
1
0
0
0
0
0
0
0
0
0
8
3
3
0
0