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LOFF: Lead-Off Control Register Address = 04h register.
The Lead-Off Control Register configures the Lead-Off detection operation. Bits[7:5] COMP_TH[2:0]: Lead-off comparator threshold These bits determine the lead-off comparator threshold level setting. See the Lead-Off Detection subsection of the ECG-Specific Functions section for a detailed description. Comparator positive side 000 = 95% (default) 001 = 92.5% 010 = 90% 011 = 87.5% 100 = 85% 101 = 80% 110 = 75% 111 = 70% Comparator negative side 000 = 5% (default) 001 = 7.5% 010 = 10% 011 = 12.5% 100 = 15% 101 = 20% 110 = 25% 111 = 30% Bit 4 VLEAD_OFF_EN: Lead-off detection mode This bit determines the lead-off detection mode. 0 = Current source mode lead-off (default) 1 = Pull-up/pull-down resistor mode lead-off Bits[3:2] ILEAD_OFF[1:0]: Lead-off current magnitude These bits determine the magnitude of current for the current lead-off mode. 00 = 6nA (default) 01 = 12nA 10 = 18nA 11 = 24nA Bits[1:0] FLEAD_OFF[1:0]: Lead-off frequency These bits determine the frequency of lead-off detect for each channel. 00 = When any bits of the LOFF_SENSP or LOFF_SENSN registers are turned on, make sure that FLEAD[1:0] are either set to 01 or 11 (default) 01 = AC lead-off detection at fDR/4 10 = Do not use 11 = DC lead-off detection turned on
LOFF_SENSP Address = 0Fh This register selects the positive side from each channel for lead-off detection. See the Lead-Off Detection subsection of the ECG-Specific Functions section for details. Note that the LOFF_STATP register bits are only valid if the corresponding LOFF_SENSP bits are set to '1'. Note that registers bits[5:4] are not available for the ADS1294/4R. Bits[7:6] are not available for the ADS1294/6/4R/6R.
LOFF_SENSN Address = 10h This register selects the negative side from each channel for lead-off detection. See the Lead-Off Detection subsection of the ECG-Specific Functions section for details. Note that the LOFF_STATN register bits are only valid if the corresponding LOFF_SENSN bits are set to '1'. Note that registers bits[5:4] are not available for the ADS1294/4R. Bits[7:6] are not available for the ADS1294/6/4R/6R.
LOFF_FLIP Address = 11h This register controls the direction of the current used for lead-off derivation. See the Lead-Off Detection subsection of the ECG-Specific Functions section for details.
LOFF_STATP (Read-Only Register) Address = 12h BIT 7 BIT 6 BIT
