Datasheet

AD9634
Rev. 0 | Page 25 of 32
PI.
SPI ACCESSIBLE FEATURES
Tabl e 12 provides a brief description of the general features that
are accessible via the SPI. These features are described in detail in
AN-877 Application Note, Interfacing to High Speed ADCs via
S
Table 12. Features Accessible Using the SPI
Feature Name Description
Mode
Allows the user to set either power-down mode
or standby mode
Clock Allows the user to access the DCS via the SPI
Offset
Allows the user to digitally adjust the
converter offset
Test I/O
Allows the user to set test modes to have
known data on output bits
Output Mode Allows the user to set up outputs
Output Phase Allows the user to set the output clock polarity
Output Delay Allows the user to vary the DCO delay
VREF Allows the user to set the reference voltage
Digital
Processing
Allows the user to enable the synchronization
features
DON’T CARE
DON’T CAREDON’T CARE
DON’T CARE
SDIO
SCLK
CSB
t
S
t
DH
t
CLK
t
DS
t
H
R/W W1 W0 A12 A11 A10 A9 A8 A7
D5 D4 D3 D2 D1 D0
t
LOW
t
HIGH
09996-055
Figure 58. Serial Port Interface Timing Diagram