Start
Reading
From Read
Flowchart
ADS1210/11
drives DRDY LOW
Start
Writing
To Write
Flowchart
ADS1210/11
drives DRDY LOW
CS taken HIGH
for 10.5 tXIN periods
minimum (see text
if CS tied LOW).
CS
state
HIGH
CS taken HIGH
for 10.5 tXIN periods
minimum (see text
if CS tied LOW).
LOW
CS
state
CS
state
Continuous
Read
Mode?
HIGH
HIGH
Yes
LOW
CS
state
LOW
No
External device
HIGH
generates 8
serial clock cycles
and transmits
instruction register
data via SDIO
External device generates
8 serial clock cycles
LOW
and rteracnesivmesits
instruction register
data via SDIO
External device
generates n
serial clock cycles
and transmits
specified
register data
via SDIO
Use
SDIO for
output?
Yes
No
SDIO input to
output transition
SDOUT becomes
active
ADS1210/11
drives DRDY HIGH
External device generates
n serial clock cycles
and transmits
External device generates
n serial clock cycles
and receives
Yes
No
Is Next
Instruction
a Read?
More
Instructions?
specified register
data via SDOUT
specified register
data via SDIO
See text
for restrictions
No
Yes
SDOUT returns to
tri-state condition
SDIO transitions to
tri-state condition
End
To Read
Flowchart
ADS1210/11
drives DRDY HIGH
No
Is Next
Instruction
a Write?
Yes
More
Instructions?
See text
for restrictions
Yes
No
End
To Write
Flowchart
FIGURE 26. Flowchart for Writing and Reading Register Data, Slave Mode.
ADS1210, ADS1211
28
SBAS034B
www.ti.com