Datasheet

ADS1291
ADS1292
ADS1292R
SBAS502B –DECEMBER 2011–REVISED SEPTEMBER 2012 www.ti.com
RESP1: Respiration Control Register 1
Address = 09h
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
RESP_ RESP_MOD_
RESP_PH3 RESP_PH2 RESP_PH1 RESP_PH0 1 RESP_CTRL
DEMOD_EN1 EN
This register controls the respiration functionality. This register applies to the ADS1292R version only. For the
ADS1291 and ADS1292 devices, 02h must be written to the RESP1 register.
Bit 7 RESP_DEMOD_EN1: Enables respiration demodulation circuitry
This bit enables and disables the demodulation circuitry on channel 1.
0 = RESP demodulation circuitry turned off (default)
1 = RESP demodulation circuitry turned on
Bit 6 RESP_MOD_EN: Enables respiration modulation circuitry
This bit enables and disables the modulation circuitry on channel 1.
0 = RESP modulation circuitry turned off (default)
1 = RESP modulation circuitry turned on
Bits[5:2] RESP_PH[3:0]: Respiration phase
(1)
These bits control the phase of the respiration demodulation control signal.
RESP_PH[3:0] RESP_CLK = 32kHz RESP_CLK = 64 kHz
0000 0° (default) 0° (default)
0001 11.25° 22.5°
0010 22.5° 45°
0011 33.75° 67.5°
0100 45° 90°
0101 56.25° 112.5°
0110 67.5° 135°
0111 78.75° 157.5°
1000 90° Not available
1001 101.25° Not available
1010 112.5° Not available
1011 123.75° Not available
1100 135° Not available
1101 146.25° Not available
1110 157.5° Not available
1111 168.75° Not available
(1) The RESP_PH3 bit is ignored when RESP_CLK = 64 kHz.
Bit 1 Must be set to '1'
Bit 0 RESP_CTRL: Respiration control
This bit sets the mode of the respiration circuitry.
0 = Internal respiration with internal clock
1 = Internal respiration with external clock
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