Datasheet

ADS1294, ADS1294R

ADS1296, ADS1296R

ADS1298, ADS1298R

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SBAS459I –JANUARY 2010–REVISED JANUARY 2012

RESP: Respiration Control Register

Address = 16h

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

RESP_ RESP_MOD_

1 RESP_PH2 RESP_PH1 RESP_PH0 RESP_CTRL1 RESP_CTRL0

DEMOD_EN1 EN1

This register provides the controls for the respiration circuitry; see the Respiration section for details.

Bit 7 RESP_DEMOD_EN1: Enables respiration demodulation circuitry (ADS1294R/6R/8R only, for ADS1294/6/8 always

write '0')

This bit enables/disables the demodulation circuitry on channel 1.

0 = RESP demodulation circuitry turned off (default)

1 = RESP demodulation circuitry turned on

Bit 6 RESP_MOD_EN1: Enables respiration modulation circuitry (ADS1294R/6R/8R only, for ADS1294/6/8 always write '0')

This bit enables/disables the modulation circuitry on channel 1.

0 = RESP modulation circuitry turned off (default)

1 = RESP modulation circuitry turned on

Bit 5 Reserved

Must always be set to '1' for ADS1294R/6R/8R. This bit does not have any effect for the ADS1294/6/8.

Bits[4:2] RESP_PH[2:0]: Respiration phase

(1)

These bits control the phase of the respiration demodulation control signal. (GPIO4 is out-of-phase with GPIO3 by the

phase determined by the RESP_PH bits.)

000 = 22.5° (default)

001 = 45°

010 = 67.5°

011 = 90°

100 = 112.5°

101 = 135°

110 = 157.5°

111 = N/A

Bits[1:0] RESP_CTRL[1:0]: Respiration control

These bits set the mode of the respiration circuitry.

00 = No respiration (default)

01= External respiration

10 = Internal respiration with internal signals

11 = Internal respiration with user-generated signals

(1) RESP_PH[2:0] phase control bits only for internal respiration (RESP_CTRL = 10) and external respiration (RESP_CTRL = 01) modes

when the CONFIG4.RESP_FREQ[2:0] register bits are 000b or 001b.

Product Folder Link(s): ADS1294 ADS1294R ADS1296 ADS1296R ADS1298 ADS1298R