DAC1221 Datasheet, PDF (13/14 Pages) Burr-Brown (TI) – 16-Bit Low Power DIGITAL-TO-ANALOG CONVERTER

CS
SCLK
SDIO
t₁₀
IN7
t₁₁
t₁₂
IN0
OUT MSB
t₁₃
OUT0
t₉
SDIO is an input
SDIO is an output
FIGURE 9. SDIO Input to Output Transition Timing.
Start
Writing
CS
state
HIGH
LOW
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
From Read
flowchart
CS taken HIGH
for t₁₅ periods
minimum
(or CS tied LOW)
CS
state
HIGH
LOW
More
Yes
instructions?
No
End
Is next
No
instruction
a read?
Yes
To Read
flowchart
Start
Reading
CS
state
HIGH
LOW
External device
generates 8 serial
clock cycles and
transmits instruction
register data
via SDIO
SDIO input to
output transition
External device
generates n serial
clock cycles and
receives specified
register data via SDIO
SDIO transitions to
tri-state condition
To Write
flowchart
CS taken HIGH
for t₁₅ periods
minimum
(or CS tied LOW)
CS
state
HIGH
LOW
More
Yes
instructions?
No
End
Is next
No
instruction
a Write?
Yes
To Write
flowchart
FIGURE 10. Flowchart for Writing and Reading Register Data.
13
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DAC1221