Datasheet

Data Sheet ADAS1000-3/ADAS1000-4
Rev. A | Page 59 of 76
Table 33. Pace Amplitude Threshold Register (PACEAMPTH) Address 0x07, Reset Value = 0x242424
1
R
/W
Default Bit Name Function
R/W 0010 0100 [23:16] PACE3AMPTH Pace amplitude threshold
Threshold = N × 2 × VREF/GAIN/2
16
R/W
0010 0100
[15:8]
PACE2AMPTH
R/W 0010 0100 [7:0] PACE1AMPTH
1
ADAS1000-4 model only, ADAS1000-3 model does not contain these features.
Table 34. Test Tone Register (TESTTONE) Address 0x08, Reset Value = 0x000000
R
/W
Default Bit Name Function
R/W 0 23 TONLA Tone select
0 (default)
= 1.3 V VCM_REF
1 = 1 mV sine wave or square wave for TONINT = 1, no connect for TONINT = 0
R/W 0 22 TONLL
R/W 0 21 TONRA
R/W 0 [20:5] Reserved Reserved, set to 0
R/W 00 [4:3] TONTYPE 00 (default) = 10 Hz sine wave
01 = 150 Hz sine wave
1x = 1 Hz, 1 mV square wave
R/W 0 2 TONINT Test tone internal or external
0 (default)
= external test tone; test tone to be sent out through CAL_DAC_IO and
applied externally to enabled channels
1 = internal test tone; disconnects external switches for all ECG channels and
connects the calibration DAC test tone internally to all ECG channels; in gang
mode, the CAL_DAC_IO is connected, and the slave disables the calibration DAC
R/W 0 1 TONOUT Test tone out enable
0 (default)
= disconnects test tone from CAL_DAC_IO during internal mode only
1 = connects CAL_DAC_IO to test tone during internal mode
R/W 0 0 TONEN
Enables an internal test tone to drive entire signal chain, from preamplifier to SPI
interface; this tone comes from the calibration DAC and goes to the preamplifier
through the internal mux; when TONEN (calibration DAC) is enabled, ac lead-off is
disabled
0 (default) = disable the test tone
1 = enable the 1 mV sine wave test tone (calibration mode has priority)