Datasheet

AD9913
Rev. A | Page 26 of 32
REGISTER MAP AND BIT DESCRIPTIONS
REGISTER MAP
Note that the highest number found in the Serial Bit Range column for each register in the following tables is the MSB and the lowest
number is the LSB for that register.
Table 9. Control Registers
Register
Name
(Serial
Address)
[Serial Bit
Range]/
Parallel
Address
MSB
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
LSB
Bit 0
Default
Value
CFR1—
Control
Function
Register 1
(0x00)
[7:0]/0x00 External
Power-
Down
Mode
Digital
Power-
Down
DAC
Power-
Down
Clock
Input
Power-
Down
Load SRR @
IO_UPDATE
Autoclear
Auxiliary
Accum.
Autoclear
Phase
Accum.
Enable
Sine
Output
0x00
[15:8]/0x01 Clear
Auxiliary
Accum.
Clear
Phase
Accum.
Destination [1:0]
00: Frequency Word
01: Phase Word
Auxiliary
Accumulator
Enable
DC
Output
Active
Linear
Sweep
State
Trigger
Active
Linear
Sweep
No-Dwell
Active
0x00
[23:16]/0x02 LSB First Internal Profile Control [2:0] Sync Clock
Disable
Open Open Direct
Switch
Mode
Active
0x00
[31:24]/0x03 Open Open Open Modulus
Enable
Use Internal
Profile
Match
Pipe
Delays
Active
Open Open 0x00
CFR2—
Control
Function
Register 2
(0x01)
[7:0]/0x04 CMOS
Clock
Mode
1
Crystal
Clock
Mode
1
PLL
Power-
Down
1
PLL LO
Range
PLL Input
Div by 2
VCO2 Sel PLL Reset PLL Lock 0x32
[15:8]/0x05 PLL
Output
Div by 2
PLL Multiplication Factor [5:0] Open 0x14
DAC Control
Register
(0x02)
[7:0]/0x06 FS C [7:0] 0xFF
[15:8]/0x07 Open Open Reserved Open FSC [9:8] 0x13
[23:16]/0x08 Reserved 0x7F
[31:24]/0x09 Reserved 0x00
FTW
(0x03)
[7:0]/0x0A Frequency Tuning Word [7:0] 0x00
[15:8]/0x0B Frequency Tuning Word [15:8] 0x00
[23:16]/0x0C Frequency Tuning Word [23:16] 0x00
[31:24]/0x0D Frequency Tuning Word [31:24] 0x00
POW
(0x04)
[7:0]/0x0E Phase Offset Word [7:0] 0x00
[15:8]/0x0F Open [1:0] Phase Offset Word [13:8] 0x00
Linear Sweep
Parameter
Register
(0x06)
[7:0]/0x12 Sweep Parameter Word 0 [7:0] 0x00
[15:8]/0x13 Sweep Parameter Word 0 [15:8] 0x00
[23:16]/0x14 Sweep Parameter Word 0 [23:16] 0x00
[31:24]/0x15 Sweep Parameter Word 0 [31:24] 0x00
[39:32]/0x16 Sweep Parameter Word 1 [7:0] 0x00
[47:40]/0x17 Sweep Parameter Word 1 [15:8] 0x00
[55:48]/0x18 Sweep Parameter Word 1 [23:16] 0x00
[63:56]/0x19 Sweep Parameter Word 1 [31:24] 0x00
Linear Sweep
Delta
Parameter
Register
(0x07)
[7:0]/0x1A Rising Delta Word [7:0] 0x00
[15:8]/0x1B Rising Delta Word [15:8] 0x00
[23:16]/0x1C Rising Delta Word [23:16] 0x00
[31:24]/0x1D Rising Delta Word [31:24] 0x00
[39:32]/0x1E Falling Delta Word [7:0] 0x00
[47:40]/0x1F Falling Delta Word [15:8] 0x00
[55:48]/0x20 Falling Delta Word [23:16] 0x00
[63:56]/0x21 Falling Delta Word [31:24] 0x00