TDC-GP30 datasheet(67/89 Pages) AMSCO

67 / 89 page

Ultrasonic Flow Converter

Vol. 1

TDC-GP30

7-18

www.acam.de

DB_GP30Y_Vol1_en.docx V0.0

Bit

Description

Format

Reset

divided by 3

….

127:

divided by 128

7.3.11

CR_USM_TOF (Ultrasonic Measurement Time of Flight)

0x0CA

Bit

Description

Format

Reset

31:16

Not used

15:14

TOF_EDGE_MODE: Time of Flight, Edge Mode

00: Time measurement on positive edge of TOF Hit

01: Time measurement on negative edge of TOF Hit

10: Edge for TOF hit toggling after every measurement cycle

11: Edge for TOF hit toggling after every 2. measurement cycle

BIT2

b00

TOF_HITS_TO_FDB: TOF Hits stored to frontend data buffer

0: Only TOF sum of all values is stored to Frontend Data Buffer

1: TOF sum of all values and the first 8 TOF values are stored to

Frontend Data Buffer

BIT

12:8

TOF_HIT_NO: Number of TOF hits taken for TDC measurement

1 Hit

2 Hits

….

31:

31 Hits

UINT

[4:0]

7:6

TOF_HIT_IGN: Number of hits ignored between two TOF hits taken for TDC

measurement

00:

0 Hits

01:

1 Hit

10:

2 Hits

11:

3 Hits

BIT2

b00

5:1

TOF_START_HIT_NO: Defines number of detected hits, which is the

starting TOF hit for TDC measurement

1. Hit

(not recommended)

2. Hit

(not recommended)

3. Hit

….

31:

32. Hit

1. and 2. hit not recommended, because switching from First Wave Level to

Zero Cross Level is first stable with 3. hit

UINT

[4:0]

TOF_START_HIT_MODE: Selects mode for TOF start hit

0: Start hit for TOF measurement defined by TOF_START_HIT_NO

1: Start hit for TOF measurement defined by TOF_START_HIT_DLY

BIT

7.3.12

CR_USM_AM (Ultrasonic Measurement Amplitude Measurement)

0x0CB

Bit

Description

Format

Reset

31:16

Not used

PWD_EN: Enables pulse width detection

Pulse width detection disabled

BIT

TDC-GP30 Datasheet(PDF) 67 Page - ams AG

TDC-GP30 Datasheet(HTML) 67 Page - ams AG

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