Datasheet

ADS1194, ADS1196

ADS1198

www.ti.com

SBAS471C –APRIL 2010– REVISED NOVEMBER 2011

GPIO: General-Purpose I/O Register

Address = 14h

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

GPIOD4 GPIOD3 GPIOD2 GPIOD1 GPIOC4 GPIOC3 GPIOC2 GPIOC1

The General-Purpose I/O Register controls the action of the three GPIO pins.

Bits [7:4] GPIOD[4:1]: GPIO 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.

Bits [3:0] GPIOC[4:1]: GPIO control (corresponding GPIOD)

These bits determine if the corresponding GPIOD pin is an input or output.

0 = Output

1 = Input (default)

PACE: PACE Detect Register

Address = 15h

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

0 0 0 PACEE1 PACEE0 PACEO1 PACEO0 PD_PACE

This register provides the PACE controls that configure the channel signal used to feed the external PACE detect

circuitry. See the Pace Detect subsection of the ECG-Specific Functions section for details.

Bits [7:5] Must always be set to '0'

Bits [4:3] PACEE[1:0]: PACE even channels

These bits control the selection of the even number channels available on TEST_PACE_OUT1. Note that only one channel

may be selected at any time.

00 = Channel 2 (default)

01 = Channel 4

10 = Channel 6, ADS1196/8 only

11 = Channel 8, ADS1198 only

Bits [2:1] PACEO[1:0]: PACE odd channels

These bits control the selection of the odd number channels available on TEST_PACE_OUT2. Note that only one channel

may be selected at any time.

00 = Channel 1 (default)

01 = Channel 3

10 = Channel 5, ADS1196/8 only (default)

11 = Channel 7, ADS1198 only

Bit [0] PD_PACE: PACE detect buffer

This bit is used to enable/disable the PACE detect buffer.

0 = PACE detect buffer turned off (default)

1 = PACE detect buffer turned on

Product Folder Link(s): ADS1194 ADS1196 ADS1198