AD9213 datasheet(97/110 Pages) AD

97 / 110 page

Data Sheet

AD9213

Rev. A | Page 97 of 110

Address

Bits

Bit Name

Settings

Description

Default

Access

11 Test mode. Input samples are forced to

+0.999… (positive full scale). The NCO is

enabled, and this test mode allows the

NCOs to directly drive the decimation filters

and is useful when evaluating the perfor-

mance of the NCOs and decimation filters.

DDC0_GAIN

Gain Selection. Note that gain can be used

to compensate for the 6 dB loss associated

with mixing an input signal down to

baseband and filtering out its negative

component.

0x0

R/W

00 dB gain.

1 6 dB gain (multiply by 2).

Reserved

Reserved.

0x0

0x631

DDC_DEC_CTRL

[7:4]

Reserved

Reserved.

0x0

[3:0]

DDC0_DEC_SEL

Decimation Ratio Selection.

0x0

R/W

0 Decimate by 2.

1 Decimate by 4.

2 Decimate by 8.

3 Decimate by 16.

4 Decimate by 32.

5 Decimate by 64.

6 Decimate by 128.

7 Reserved.

8 Decimate by 6.

9 Decimate by 12.

10 Decimate by 24.

11 Decimate by 48.

12 Decimate by 96.

13 Reserved.

14 Reserved.

15 Reserved.

0x632

DDC_NCO_CTRL

[7:4]

DDC0_NCO_CHAN_SEL_

MODE

NCO Channel Selection Mode. Note that for

edge control/frequency hop timer (FHT)-

based control, the internal counter wraps

when the DDC_NCO_REGMAP_CHAN_SEL

value is reached.

0x0

R/W

0000 Register map control (use DDC_NCO_

REGMAP_CHAN_SEL).

0001 PROFILE_PINS[0] used. Pin level control

(3'b0, PROFILE_PINS[0]).

0010 PROFILE_PINS[1:0] used. Pin level control

(2'b0, PROFILE_PINS[1:0]).

0011 PROFILE_PINS[2:0] are used. Pin level

control (1'b0, PROFILE_PINS[2:0]).

0100 PROFILE_PINS[3:0] are used. Pin level

control (PROFILE_PINS[3:0]).

0101 to

0111

Reserved

1000 PROFILE_PINS[0]. Pin edge control,

increments internal counter when rising

edge of PROFILE_PINS[0].

1100 FHT expire based control. Increment

internal counter when FHT is expired.

1101 to

1111

Reserved

[3:0]

DDC0_NCO_REGMAP_

CHAN_SEL

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.

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