AD9655 datasheet(34/38 Pages) AD

34 / 38 page

Data Sheet

AD9655

Addr.

(Hex)

Parameter Name

Bit 7

(MSB)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(LSB)

Default

Value

(Hex)

Comments

0x21

Serial output

data control

(global)

LVDS

output

0 = MSB

first

(default)

1 = LSB

first

SDR/DDR one-lane/two-lane,

bitwise/bytewise, Bits[6:4]

000 = SDR two-lane, bitwise

001 = SDR two-lane, bytewise

010 = DDR two-lane, bitwise

011 = DDR two-lane, bytewise (default)

100 = DDR one-lane, wordwise

0 = 1×

frame

(default)

1 = 2×

frame

Serial output

number of bits

00 = 16 bits (default)

01 = 14 bits

10 = 12 bits

11 = 10 bits

0x30

Serial stream

control.

0x22

Serial channel

status (local)

Open

Channel

output

reset

Channel

power-

down

0x00

Used with

to power

down

individual

sections of a

converter.

0x101

User Input/Output

Control 2

Open

Disable

SDIO

pull-down

0x00

Disables SDIO

pull-down

resistor.

0x102

User Input/Output

Control 3

Open

VCM

power-

down

0x00

VCM control.

0x107

Foreground

calibrations status

Open

Bit 1 = 1

during

foreground

calibration,

Bit 1 = 0

after

calibration

is complete

Bit 0 = 1

during

foreground

calibration,

Bit 0 = 0

after

calibration

is complete

0x00

Read only.

0x112

Clock monitor

control

Open

Recovery mode

000 = recovery off (default)

101 = recovery on

0x07

Select clock

recovery

mode.

0x114

VREF control

Open

Drive

VREF

external

0 = no

1 = yes

VREF

00 = 1.0 V

01 = 1.2 V

10 = 1.3 V

11 = 1.4 V

0x00

Bits[1:0] set

the internal

reference

voltage. Bit 2

disables the

reference if

an external

source is

desired.

Rev. 0 | Page 33 of 37

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