AD6643 Analog Devices, AD6643 Datasheet - Page 28

• Manufacturer Part Number: AD6643
• Description: Dual IF Receiver
• Manufacturer: Analog Devices

AD6643
SPI ACCESSIBLE FEATURES
Table 13 provides a brief description of the general features that
are accessible via the SPI. These features are described in detail
in the
via SPI (available at www.analog.com). The AD6643 part-
specific features are described in the Memory Map Register
Description section.
SCLK
SDIO
CSB
DON’T CARE
DON’T CARE
AN-877
Application Note, Interfacing to High Speed ADCs
t
S
R/W
t
DS
W1
W0
t
DH
A12
t
HIGH
A11
t
Figure 45. Serial Port Interface Timing Diagram
LOW
A10
A9
Rev. A | Page 28 of 36
t
CLK
A8
A7
Table 13. Features Accessible Using the SPI
Feature Name
Power Mode
Clock
Offset
Test I/O
Output Mode
Output Phase
Output Delay
VREF
Digital Processing
D5
D4
Description
Allows the user to set either power-down
mode or standby mode
Allows the user to access the DCS via the SPI
Allows the user to digitally adjust the
converter offset
Allows the user to set test modes to have
known data on output bits
Allows the user to set up outputs
Allows the user to set the output clock polarity
Allows the user to vary the DCO delay
Allows the user to set the reference voltage
Allows the user to enable the synchroniza-
tion features
D3
D2
D1
D0
Data Sheet
t
H
DON’T CARE
DON’T CARE