Datasheet

ADS1299

www.ti.com

SBAS499A –JULY 2012–REVISED AUGUST 2012

LOFF_SENSP: Lead Off Positive Sense Selection

Address = 0Fh

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

LOFFP8 LOFFP7 LOFFP6 LOFFP5 LOFFP4 LOFFP3 LOFFP2 LOFFP1

This register selects the positive side from each channel for lead-off detection. See the Lead-Off Detection

subsection of the EEG-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'.

LOFF_SENSN: Lead Off Negative Sense Selection

Address = 10h

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

LOFFM8 LOFFM7 LOFFM6 LOFFM5 LOFFM4 LOFFM3 LOFFM2 LOFFM1

This register selects the negative side from each channel for lead-off detection. See the Lead-Off Detection

subsection of the EEG-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'.

LOFF_FLIP: Lead Off Current Direction Control

Address = 11h

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

LOFF_FLIP8 LOFF_FLIP7 LOFF_FLIP6 LOFF_FLIP5 LOFF_FLIP4 LOFF_FLIP3 LOFF_FLIP2 LOFF_FLIP1

This register controls the current direction used for lead-off derivation. See the Lead-Off Detection subsection of

the EEG-Specific Functions section for details.

LOFF_STATP: Lead-Off Positive Input Status

Address = 12h

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

IN8P_OFF IN7P_OFF IN6P_OFF IN5P_OFF IN4P_OFF IN3P_OFF IN2P_OFF IN1P_OFF

This register stores the status of whether the positive electrode on each channel is on or off. See the Lead-Off

Detection subsection of the EEG-Specific Functions section for details. Ignore the LOFF_STATP values if the

corresponding LOFF_SENSP bits are not set to '1'.

'0' is lead-on (default) and '1' is lead-off. When the LOFF_SENSP bits are '0', the LOFF_STATP bits should be

ignored.

LOFF_STATN: Lead-Off Negative Input Status

Address = 13h

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

IN8M_OFF IN7M_OFF IN6M_OFF IN5M_OFF IN4M_OFF IN3M_OFF IN2M_OFF IN1M_OFF

This register stores the status of whether the negative electrode on each channel is on or off. See the Lead-Off

Detection subsection of the EEG-Specific Functions section for details. Ignore the LOFF_STATN values if the

corresponding LOFF_SENSN bits are not set to '1'.

'0' is lead-on (default) and '1' is lead-off. When the LOFF_SENSN bits are '0', the LOFF_STATP bits should be

ignored.

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