TDC1011_15 Datasheet, PDF (31/49 Pages) Texas Instruments – TDC1011 Single Channel Ultrasonic Sensing Analog Front End (AFE) for Level Sensing,Concentration Sensing Applications

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TDC1011
SNAS662 – JULY 2015
8.6.1.2 CONFIG_1 Register (address = 1h) [reset = 40h] (map)
Figure 42. CONFIG_1 Register
(MSB) 7
6
RESERVED
R/W-1h
5
4
3
RESERVED
R/W-0h
2
1
0 (LSB)
NUM_RX
R/W-0h
LEGEND: R/W = Read or write; R = Read only; R/W1C = Read or write 1 to clear
Table 5. CONFIG_1 Register Field Descriptions
Bit Field
Type
Reset
Description
[7:6] RESERVED
[5:3] RESERVED
R/W
1h
R/W
0h
1h: Reserved (default)
Must always be written 0h (default)
[2:0] NUM_RX
R/W
0h
Number of expected receive events
0h: Do not count events (32 STOP pulses output) (default)
1h: 1 event (1 STOP pulse output)
2h: 2 events (2 STOP pulses output)
3h: 3 events (3 STOP pulses output)
4h: 4 events (4 STOP pulses output)
5h: 5 events (5 STOP pulses output)
6h: 6 events (6 STOP pulses output)
7h: 7 events (7 STOP pulses output)
8.6.1.3 CONFIG_2 Register (address = 2h) [reset = 0h] (map)
Figure 43. CONFIG_2 Register
(MSB) 7
6
5
4
VCOM_SEL MEAS_MODE DAMPING
R/W-0h
R/W-0h
R/W-0h
3
2
1
RESERVED
R/W-0h
LEGEND: R/W = Read or write; R = Read only; R/W1C = Read or write 1 to clear
Bit Field
[7]
VCOM_SEL
[6]
MEAS_MODE
[5]
DAMPING
[4:0] RESERVED
Table 6. CONFIG_2 Register Field Descriptions
Type
Reset
Description
R/W
0h
Common-mode voltage reference control
0h: Internal (default)
1h: External
R/W
0h
AFE measurement type
0h: Time-of-flight measurement (default)
1h: Temperature measurement
R/W
0h
R/W
0h
TX burst damping
0h: Disable damping (default)
1h: Enable damping
Must always be written 0h (default)
0 (LSB)
8.6.1.4 CONFIG_3 Register (address 3h) [reset = 3h] (map)
Figure 44. CONFIG_3 Register
(MSB) 7
RESERVED
R/W-0h
6
TEMP_MODE
R/W-0h
5
4
TEMP_RTD_SEL TEMP_CLK_DIV
R/W-0h
R/W-0h
3
BLANKING
R/W-0h
LEGEND: R/W = Read or write; R = Read only; R/W1C = Read or write 1 to clear
2
1
0 (LSB)
ECHO_QUAL_THLD
R/W-3h
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