AD9166 datasheet(87/138 Pages) AD

87 / 138 page

Data Sheet

AD9166

Rev. 0 | Page 87 of 138

Hex.

Addr.

Bit

No.

Bit Name

Settings

Description

Reset

Access

110 Automatically generate

FTW_LOAD_REQ after FTW5 is

written.

Reserved

Reserved.

0x0

FTW_LOAD_SYSREF

FTW load and reset from rising

edge of SYSREF±.

0x0

R/W

FTW_LOAD_ACK

Frequency tuning word

update acknowledge.

0x0

0 FTW is not loaded.

1 FTW is loaded.

FTW_LOAD_REQ

Frequency tuning word

update request from SPI.

0x0

R/W

0 Clear FTW_LOAD_ACK.

1 0 to 1 transition loads the

FTW.

0x114

FTW0

[7:0] FTW[7:0]

NCO frequency tuning word.

This is X in the equation fOUT =

fCLK × (M/N) = fCLK × ((X +

A/B)/248).

0x0

R/W

0x115

FTW1

[7:0] FTW[15:8]

NCO frequency tuning word.

This is X in the equation fOUT =

fCLK × (M/N) = fCLK × ((X +

A/B)/248).

0x0

R/W

0x116

FTW2

[7:0] FTW[23:16]

NCO frequency tuning word.

This is X in the equation fOUT =

fCLK × (M/N) = fCLK × ((X +

A/B)/248).

0x0

R/W

0x117

FTW3

[7:0] FTW[31:24]

NCO frequency tuning word.

This is X in the equation fOUT =

fCLK × (M/N) = fCLK × ((X +

A/B)/248).

0x0

R/W

0x118

FTW4

[7:0] FTW[39:32]

NCO frequency tuning word.

This is X in the equation fOUT =

fCLK × (M/N) = fCLK × ((X +

A/B)/248).

0x0

R/W

0x119

FTW5

[7:0] FTW[47:40]

NCO frequency tuning word.

This is X in the equation fOUT =

fCLK × (M/N) = fCLK × ((X +

A/B)/248).

0x0

R/W

0x11C

PHASE_OFFSET0

[7:0] NCO_PHASE_OFFSET[7:0]

NCO phase offset.

0x0

R/W

0x11D

PHASE_OFFSET1

[7:0] NCO_PHASE_OFFSET[15:8]

NCO phase offset.

0x0

R/W

0x124

ACC_MODULUS0

[7:0] ACC_MODULUS[7:0]

DDS modulus. This is B in the

equation fOUT = fCLK × (M/N) = fCLK

× ((X + A/B)/248). This modulus

value is used for all NCO FTWs.

0x0

R/W

0x125

ACC_MODULUS1

[7:0] ACC_MODULUS[15:8]

DDS modulus. This is B in the

equation fOUT = fCLK × (M/N) = fCLK

× ((X + A/B)/248). This modulus

value is used for all NCO FTWs.

0x0

R/W

0x126

ACC_MODULUS2

[7:0] ACC_MODULUS[23:16]

DDS modulus. This is B in the

equation fOUT = fCLK × (M/N) =

fCLK × ((X + A/B)/248). This

modulus value is used for all

NCO FTWs.

0x0

R/W

0x127

ACC_MODULUS3

[7:0] ACC_MODULUS[31:24]

DDS modulus. This is B in the

equation fOUT = fCLK × (M/N) =

fCLK × ((X + A/B)/248). This

modulus value is used for all

NCO FTWs.

0x0

R/W

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