EVAL-AD9832EB Analog Devices Inc, EVAL-AD9832EB Datasheet - Page 12

• Manufacturer Part Number: EVAL-AD9832EB
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD9832EB

• Lead Free Status / Rohs Status: Not Compliant

AD9832
SET PINS OR FREQUENCY/PHASE REGISTER WRITE
SET SYNC AND/OR SELSRC TO 1
PHASEREG<3:0> = DELTA PHASE<0, 1, 2, 3>
CONTROL REGISTER WRITE
SET FSELECT, PSEL0 AND PSEL1
INITIALIZATION*
Figure 23. Initialization
CONTROL REGISTER WRITE
FREG<0> = f
FREG<1> = f
SET SLEEP
RESET = 1
CLR = 1
WRITE INITIAL DATA
V
NO
CHANGE FSELECT
RESET = 0
OUT
SLEEP = 0
CLR = 0
OUT0
OUT1
= V
REFIN
/f
/f
Figure 22. Flow Chart for AD9832 Initialization and Operation
CONTROL REGISTER WRITE
MCLK
MCLK
WAIT 6 MCLK CYCLES (8 MCLK CYCLES IF SYNC = 1)
*6.25*R
*2
*2
PHASEREG <3:0> = DELTA PHASE<0, 1, 2, 3>
32
32
YES
SELSRC = 1
SYNC = 1
AND/OR
OUT
NO
NO
/R
SELECT DATA SOURCES***
SET
FREG<0> = f
FREG<1> = f
*(1 + SIN(2 (FREG*f
SET PSEL0, PSEL1
CHANGE PHASE?
CHANGE f
CHANGE f
DATA WRITE**
DAC OUTPUT
SET FSELECT
OUT0
OUT1
YES
YES
NO
OUT
OUT
/f
/f
MCLK
MCLK
?
?
*2
*2
MCLK
32
32
YES
–12–
*t/2
CHANGE PHASEREG?
32
+ PHASEREG/2
WRITE A WORD TO ANOTHER REGISTER
DEFER REGISTER TO DATA REGISTER
WRITE PRESENT 8 BITS AND 8 BITS IN
YES
WRITE 8 BITS TO DEFER REGISTER
WRITE ANOTHER WORD TO THIS
DEFERRED TRANSFER WRITE
FSELECT/PSEL PINS BEING USED?
DIRECT TRANSFER WRITE
INITIALIZATION*
SELECT DATA SOURCES***
12
)))
DATA WRITE**
Figure 25. Selecting Data Sources
REGISTER?
NO
SET FSELECT
SET PSEL0
SET PSEL1
SET PINS
NO
CHANGE PSEL0, PSEL1
Figure 24. Data Writes
YES
SELSRC = 0
FREQUENCY/PHASE REGISTER WRITE
YES
NO
CHANGE 8 BITS ONLY
SET FSELECT
YES
SET PSEL0
SET PSEL1
SELSRC = 1
CHANGE 16 BITS
NO
REV. A