TI中文支持网各位老师：
ADS1298R的Lead OFF功能要怎么使用呢，具体的寄存器怎么配置？板子是使用TI的EVB公板。
另外我如果不使用右脚驱动，改用屏蔽网驱动行吗？
Guoliang Li：
ADS1298R的关于 Lead-Off的寄存器：
LOFF: Lead-Off Control RegisterAddress = 04hregister.
The Lead-Off Control Register configures the Lead-Off detection operation.Bits[7:5] COMP_TH[2:0]: Lead-off comparator thresholdThese bits determine the lead-off comparator threshold level setting. See the Lead-Off Detection subsection of theECG-Specific Functions section for a detailed description.Comparator positive side000 = 95% (default)001 = 92.5%010 = 90%011 = 87.5%100 = 85%101 = 80%110 = 75%111 = 70%Comparator negative side000 = 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 modeThis bit determines the lead-off detection mode.0 = Current source mode lead-off (default)1 = Pull-up/pull-down resistor mode lead-offBits[3:2] ILEAD_OFF[1:0]: Lead-off current magnitudeThese bits determine the magnitude of current for the current lead-off mode.00 = 6nA (default)01 = 12nA10 = 18nA11 = 24nABits[1:0] FLEAD_OFF[1:0]: Lead-off frequencyThese 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 eitherset to 01 or 11 (default)01 = AC lead-off detection at fDR/410 = Do not use11 = DC lead-off detection turned on
LOFF_SENSPAddress = 0FhThis register selects the positive side from each channel for lead-off detection. See the Lead-Off Detectionsubsection of the ECG-Specific Functions section for details. Note that the LOFF_STATP register bits are onlyvalid 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 theADS1294/6/4R/6R.
LOFF_SENSNAddress = 10hThis register selects the negative side from each channel for lead-off detection. See the Lead-Off Detectionsubsection of the ECG-Specific Functions section for details. Note that the LOFF_STATN register bits are onlyvalid 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 theADS1294/6/4R/6R.
LOFF_FLIPAddress = 11hThis register controls the direction of the current used for lead-off derivation. See the Lead-Off Detectionsubsection of the ECG-Specific Functions section for details.
LOFF_STATP (Read-Only Register)Address = 12hBIT 7 BIT 6 BIT
LOFF_STATN (Read-Only Register)Address = 13h
