AD9689-2000EBZ datasheet(112/134 Pages) AD

112 / 134 page

AD9689

Data Sheet

Rev. A | Page 112 of 134

Addr.

Name

Bit(s) Bit Name

Setting

Description

Reset

Access

0x0354

DDC2 NCO

control

[7:4]

DDC2 NCO channel

select mode

For edge control, the internal counter wraps when the

0x0

R/W

0000

Use Register 0x0354, Bits[3:0].

0001

GPIO_B0, GPIO_A0.

0010

GPIO_B1, GPIO_A1.

0011

GPIO_A1, GPIO_A0.

0100

GPIO_B1, GPIO_B0.

0101

GPIO_B1, GPIO_A1, GPIO_B0, GPIO_A0.

0110

GPIO_B1, GPIO_B0, GPIO_A1, GPIO_A0.

1000

Increment internal counter on rising edge of the GPIO_A0 pin.

1001

Increment internal counter on rising edge of the GPIO_A1 pin.

1010

Increment internal counter on rising edge of the GPIO_B0 pin.

1011

Increment internal counter on rising edge of the GPIO_B1 pin.

[3:0]

DDC2 NCO register

map channel select

NCO channel select register map control.

0x0

R/W

0000

Select NCO Channel 0.

0001

Select NCO Channel 1.

0010

Select NCO Channel 2.

0011

Select NCO Channel 3.

0100

Select NCO Channel 4.

0101

Select NCO Channel 5.

0110

Select NCO Channel 6.

0111

Select NCO Channel 7.

1000

Select NCO Channel 8.

1001

Select NCO Channel 9.

1010

Select NCO Channel 10.

1011

Select NCO Channel 11.

1100

Select NCO Channel 12.

1101

Select NCO Channel 13.

1110

Select NCO Channel 14.

1111

Select NCO Channel 15.

0x0355

DDC2 phase

control

[7:4]

Reserved

Reserved.

0x0

[3:0]

DDC2 phase update

index

Indexes the NCO channel whose phase and offset are updated.

The update method is based on the DDC phase update mode,

which can be continuous or require chip transfer.

0x0

R/W

0000

Update NCO Channel 0.

0001

Update NCO Channel 1.

0010

Update NCO Channel 2.

0011

Update NCO Channel 3.

0x0356

DDC2 Phase

Increment 0

[7:0]

DDC2 phase

increment[7:0]

FTW. Twos complement phase increment value for the NCO.

Complex mixing frequency = (DDC phase increment × fS)/248.

0x0

R/W

0x0357

DDC2 Phase

Increment 1

[7:0]

DDC2 phase

increment[15:8]

FTW. Twos complement phase increment value for the NCO.

Complex mixing frequency = (DDC phase increment × fS)/248.

0x0

R/W

0x0358

DDC2 Phase

Increment 2

[7:0]

DDC2 phase

increment[23:16]

FTW. Twos complement phase increment value for the NCO.

Complex mixing frequency = (DDC phase increment × fS)/248.

0x0

R/W

0x0359

DDC2 Phase

Increment 3

[7:0]

DDC2 phase

increment[31:24]

FTW. Twos complement phase increment value for the NCO.

Complex mixing frequency = (DDC phase increment × fS)/248.

0x0

R/W

0x035A DDC2 Phase

Increment 4

[7:0]

DDC2 phase

increment[39:32]

FTW. Twos complement phase increment value for the NCO.

Complex mixing frequency = (DDC phase increment × fS)/248.

0x0

R/W

0x035B

DDC2 Phase

Increment 5

[7:0]

DDC2 phase

increment[47:40]

FTW. Twos complement phase increment value for the NCO.

Complex mixing frequency = (DDC phase increment × fS)/248.

0x0

R/W

0x035D DDC2 Phase

Offset 0

[7:0]

DDC2 phase

offset[7:0]

Twos complement POW for the NCO.

0x0

R/W

0x035E

DDC2 Phase

Offset 1

[7:0]

DDC2 phase

offset[15:8]

Twos complement POW for the NCO.

0x0

R/W

0x035F

DDC2 Phase

Offset 2

[7:0]

DDC2 phase

offset[23:16]

Twos complement POW for the NCO.

0x0

R/W

0x0360

DDC2 Phase

Offset 3

[7:0]

DDC2 phase

offset[31:24]

Twos complement POW for the NCO.

0x0

R/W

0x0361

DDC2 Phase

Offset 4

[7:0]

DDC2 phase

offset[39:32]

Twos complement POW for the NCO.

0x0

R/W

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