Datasheet
ADS1212, 1213
28
SBAS064A
Start
Writing
ADS1212/13
drives DRDY LOW
CS
state
External device
generates 8
serial clock cycles
and transmits
instruction register
data via SDIO
External device
generates n
serial clock cycles
and transmits
specified
register data
via SDIO
ADS1212/13
drives DRDY HIGH
End
External device generates
8 serial clock cycles
and receives
instruction register
data via SDIO
External device generates
n serial clock cycles
and receives
specified register
data via SDOUT
End
Start
Reading
ADS1212/13
drives DRDY LOW
CS
state
Continuous
Read
M
ode
?
ADS1212/13
drives DRDY HIGH
SDOUT returns to
tri-state condition
SDOUT becomes
active
Use
SDIO for
output?
LOW
HIGH
No
Yes
LOW
No
Yes
External device generates
n serial clock cycles
and receives
specified register
data via SDIO
SDIO transitions to
tri-state condition
SDIO input to
output transition
More
Instructions?
No
Yes
Is Next
Instruction
a Read?
To Read
Flowchart
From Read
Flowchart
CS taken high
for 22 t
periods
minimum (see text
if CS tied LOW).
CS
state
LOW
HIGH
More
Instructions?
No
Is Next
Instruction
a Write?
To Write
Flowchart
Yes
See text
for restrictions
Yes
To Write
Flowchart
CS taken high
for 22 t
periods
minimum (see text
if CS tied low).
CS
state
LOW
HIGH
No
See text
for restrictions
Yes
No
HIGH
XIN
XIN
FIGURE 26. Flowchart for Writing and Reading Register Data, Slave Mode.
transmits