Datasheet

Data Sheet ADAS1000/ADAS1000-1/ADAS1000-2
Rev. A | Page 53 of 80
SPI OUTPUT FRAME STRUCTURE (ECG AND STATUS DATA)
Three data rates are offered for reading ECG data: low speed 2 kHz/16 kHz rates for electrode/lead data (32-bit words) and a high speed
128 kHz for electrode/lead data (16-bit words).
Figure 79. Output Frame Structure for 2 kHz and 16 kHz Data Rates with SDO Data Configured for Electrode or Lead Data
Figure 80. Output Frame Structure for 128 kHz Data Rate with SDO Data Configured for Electrode Data
(The 128 kHz Data Rate Can Provide Single-Ended Electrode Data or Analog Lead Mode Data Only. Digital Lead Mode Is Not Available at 128 kHz Data Rate.)
CS
1
SCLK
SDO
2
DRDY
1
CS MAY BE USED IN ONE OF THE FOLLOWING WAYS:
A) HELD LOW ALL THE TIME.
B) USED TO FRAME THE ENTIRE PACKET OF DATA.
C) USED TO FRAME EACH INDIVIDUAL 32-BIT WORD.
2
SUPER SET OF FRAME DATA, WORDS MAY BE EXCLUDED.
32-BIT
DATA WORDS
2
654 73
PACE DETECTION
V1’/V1
LEAD III/RA
V2’/V2
LEAD I/LA
LEAD II/LL
1
HEADER
RESPIRATION
MAGNITUDE
GPIO
9 108
DRIVEN OUTPUT DATA STREAM
EACH SCLK WORD IS 32 CLOCK CYCLES
ANOTHER FRAME OF DATA
CRC WORD
11
LEAD-OFF
09660-036
CS
1
SCLK
SDO
2
2
654 73
V1
RA
V2
LA
LL
1
HEADER
RESPIRATION
MAGNITUDE
DRDY
9 11108
DRIVEN OUTPUT DATA STREAM
ANOTHER FRAME
EACH SCLK WORD IS 16 CLOCK CYCLES
16-BIT
DATA WORDS
PACE
12
GPIO
CRC WORD
1
CS MAY BE USED IN ONE OF THE FOLLOWING WAYS:
A) HELD LOW ALL THE TIME.
B) USED TO FRAME THE ENTIRE PACKET OF DATA.
C) USED TO FRAME EACH INDIVIDUAL 16-BIT WORD.
2
SUPER SET OF FRAME DATA, WORDS MAY BE EXCLUDED.
LEAD-OFF
13
09660-037