ADS1291
ADS1292
ADS1292R
SBAS502A –DECEMBER 2011–REVISED MARCH 2012
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RESP2: Respiration Control Register 2
Address = 0Ah
BIT 7
BIT 6
0
BIT 5
0
BIT 4
0
BIT 3
0
BIT 2
BIT 1
BIT 0
1
CALIB_ON
RESP_FREQ
RLDREF_INT
This register controls the respiration and calibration functionality.
Bit 7
CALIB_ON: Calibration on
This bit is used to enable offset calibration.
0 = Off (default)
1 = On
Bits[6:3]
Bit 2
Must be '0'
RESP_FREQ: Respiration control frequency (ADS1292R only)
This bit controls the respiration control frequency when RESP_CTRL = 0. This bit must be written with '1' for the ADS1291
and ADS1292.
0 = 32 kHz (default)
1 = 64 kHz
Bit 1
Bit 0
RLDREF_INT: RLDREF signal
This bit determines the RLDREF signal source.
0 = RLDREF signal fed externally
1 = RLDREF signal (AVDD – AVSS)/2 generated internally (default)
Must be set to '1'
GPIO: General-Purpose I/O Register
Address = 0Bh
BIT 7
0
BIT 6
0
BIT 5
0
BIT 4
0
BIT 3
BIT 2
BIT 1
BIT 0
GPIOC2
GPIOC1
GPIOD2
GPIOD1
This register controls the GPIO pins.
Bits[7:4]
Bits[3:2]
Must be '0'
GPIOC[2:1]: GPIO 1 and 2 control
These bits determine if the corresponding GPIOD pin is an input or output.
0 = Output
1 = Input (default)
Bits[1:0]
GPIOD[2:1]: GPIO 1 and 2 data
These bits are used to read and write data to the GPIO ports.
When reading the register, the data returned correspond to the state of the GPIO external pins, whether they are
programmed as inputs or as outputs. As outputs, a write to the GPIOD sets the output value. As inputs, a write to the
GPIOD has no effect. GPIO is not available in certain respiration modes.
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