PGA460-Q1 Datasheet, PDF (72/112 Pages) Texas Instruments – Automotive Ultrasonic Signal Processor and Transducer Driver

PGA460-Q1
SLASEC8 – FEBRUARY 2017
Table 47. DECPL_TEMP Register Field Descriptions (continued)
Bit
Field
5
LPM_EN
Type
R/W
4
DECPL_TEMP_SEL
R/W
3:0
DECPL_T
R/W
Reset
0h
0h
0h
Description
PGA460 Low Power Mode Enable:
0b = Low power mode is disabled
1b = Low power mode is enabled
Decouple Time / Temperature Select:
0b = Time Decouple
1b = Temperature Decouple
Secondary decouple time / temperature decouple
If DECPL_TEMP_SEL = 0 (Time Decouple)
Time = 4096 * (DECPL_T + 1) [µs]
If DECPL_TEMP_SEL = 1 (Temperature Decouple)
Temperature = 10 * DECPL_T - 40 [degC]
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7.6.3.40 DSP_SCALE Register (Address = 27h) [reset = 0h]
DSP_SCALE is shown in Figure 82 and described in Table 48.
Return to Summary Table.
DSP non-linear scaling and noise level configuration register
Figure 82. DSP_SCALE Register
7
6
5
4
3
2
NOISE_LVL
SCALE_K
R/W-0h
R/W-0h
1
0
SCALE_N
R/W-0h
Bit
Field
7:3
NOISE_LVL
2
SCALE_K
1:0
SCALE_N
Table 48. DSP_SCALE Register Field Descriptions
Type
R/W
R/W
R/W
Reset
0h
0h
0h
Description
Value ranges from 0 to 31 with 1 LSB steps for digital gain values
(Px_DIG_GAIN_LR) less than 8
If digital gain (Px_DIG_GAIN_LR) is larger than 8, then multiply the
NOISE_LVL by Px_DIG_GAIN_LR/8
Non-Linear scaling exponent selection:
0b = 1.50
1b = 2.00
Selects the starting threshold level point from which the non-linear
gain (if enabled) is applied:
00b = TH9
01b = TH10
10b = TH11
11b = TH12
7.6.3.41 TEMP_TRIM Register (Address = 28h) [reset = 0h]
TEMP_TRIM is shown in Figure 83 and described in Table 49.
Return to Summary Table.
Temperature sensor compensation values register
Figure 83. TEMP_TRIM Register
7
6
5
4
3
2
1
0
TEMP_GAIN
TEMP_OFF
R/W-0h
R/W-0h
72
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