AD9913

Data Sheet

Rev. E | 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

Mode1

Crystal

Clock

Mode1

PLL

Power-

Down1

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]

0x11

[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