TDC1011_15 Datasheet, PDF (34/49 Pages) Texas Instruments – TDC1011 Single Channel Ultrasonic Sensing Analog Front End (AFE) for Level Sensing,Concentration Sensing Applications

TDC1011
SNAS662 – JULY 2015
www.ti.com
8.6.1.8 ERROR_FLAGS Register (address = 7h) [reset = 0h] (map)
Figure 48. ERROR_FLAGS Register
7 (MSB)
6
5
4
RESERVED
R-0h
3
2
1
0 (LSB)
ERR_
SIG_WEAK
ERR_NO_SIG
ERR_
SIG_HIGH
R-0h
R/W1C-0
R/W1C-0
LEGEND: R/W = Read or write; R = Read only; R/W1C = Read or write 1 to clear
Table 11. ERROR_FLAGS Register Field Descriptions⁽¹⁾⁽²⁾
Bit Field
[7:3] RESERVED
Type
R
Reset
0h
Description
0h: Reserved (default)
[2]
ERR_SIG_WEAK
R
0h
1h: The number of received and qualified zero-crossings was
less than the expected number set in NUM_RX field and a
timeout occurred.
[1]
ERR_NO_SIG
R/W1C 0h
1h: No signals were received and timeout occurred.
Writing a 1 to this field resets the state machine, halts active
measurements and returns the device to the SLEEP or READY
mode.
[0]
ERR_SIG_HIGH
R/W1C 0h
1h: The received echo amplitude exceeds the largest echo
qualification threshold at the input of the comparators. The error
is only reported when ECHO_QUAL_THLD = 0x07.
Writing a 1 to this field will reset all the error flags and reset the
ERRB pin to high.
(1) It is recommended to read the error status register or the ERRB pin before initiating a new measurement.
(2) All error flags should be cleared before initiating a new measurement.
8.6.1.9 TIMEOUT Register (address = 8h) [reset = 19h] (map)
Figure 49. TIMEOUT Register
(MSB) 7
RESERVED
R/W-0h
6
FORCE_
SHORT_TOF
R/W-0h
5
4
3
SHORT_TOF_BLANK_PERIOD
R/W-3h
LEGEND: R/W = Read or write; R = Read only; R/W1C = Read or write 1 to clear
2
ECHO_
TIMEOUT
R/W-0h
1
0 (LSB)
TOF_TIMEOUT_CTRL
R/W-1h
Table 12. TIMEOUT Register Field Descriptions
Bit Field
[7]
RESERVED
Type
R/W
Reset
0h
Description
0h: Reserved (default)
[6]
FORCE_SHORT_TOF
R/W
0h
Short time-of-flight control
0h: Disabled (default)
1h: Force a short time-of-flight measurement
[5:3] SHORT_TOF_BLANK_PERIOD⁽¹⁾ R/W
3h
Short time-of-flight blanking period (see Short TOF
Measurement)
0h: 8 × T0
1h: 16 × T0
2h: 32 × T0
3h: 64 × T0 (default)
4h: 128 × T0
5h: 256 × T0
6h: 512 × T0
7h: 1024 × T0
(1) See Timing Control and Frequency Scaling (CLKIN) for the definition of the time period T0.
34
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: TDC1011