Datasheet

ADAS1000/ADAS1000-1/ADAS1000-2 Data Sheet
Rev. A | Page 64 of 80
Table 36. Filter Control Register (FILTCTL) Address 0x0B, Reset Value = 0x000000
R/W
Default Bit Name Function
R/W 0 [23:6] Reserved Reserved, set to 0
R/W 0 5 MN2K 2 kHz notch bypass for SPI master
0 (default) = notch filter bypassed
1 = notch filter present
R/W 0 4 N2KBP 2 kHz notch bypass
0 (default) = notch filter present
1 = notch filter bypassed
R/W 00 [3:2] LPF[1:0] 00 (default) = 40 Hz
01 = 150 Hz
10 = 250 Hz
11 = 450 Hz
R/W 00 [1:0] Reserved Reserved, set to 0
Table 37. AC Lead-Off Upper Threshold Register (LOFFUTH) Address 0x0C, Reset Value = 0x00FFFF
R
/W
Default Bit Name Function
0 [23:20] Reserved Reserved, set to 0
R/W 0 [19:16] ADCOVER[3:0] ADC overrange threshold
An ADC out-of-range error is flagged if the ADC output is greater than the overrange
threshold; the overrange threshold is offset from the maximum value
Threshold = max_value – ADCOVER × 2
6
0000 = maximum value (disabled)
0001 = max_value − 64
0010 = max_value − 128
…
1111 = max_value − 960
R/W 0xFFFF [15:0] LOFFUTH[15:0] Applies to ac lead-off upper threshold only; lead-off is detected if the output is ≥ N ×
2 × VREF/GAIN/2
16
0 = 0 V
Table 38. AC Lead-Off Lower Threshold Register (LOFFLTH) Address 0x0D, Reset Value = 0x000000
R
/W
Default Bit Name Function
0 [23:20] Reserved Reserved, set to 0
R/W 0 [19:16] ADCUNDR[3:0] ADC underrange threshold
An ADC out-of-range error is flagged if the ADC output is less than the underrange
threshold
Threshold = min_value + ADCUNDR × 2
6
0000 = minimum value (disabled)
0001 = min_value + 64
0010 = min_value + 128
…
1111 = min_value + 960
R/W 0 [15:0] LOFFLTH[15:0] Applies to ac lead-off lower threshold only; lead-off is detected if the output is ≤ N ×
2 × VREF/GAIN/2
16
0 = 0 V