AD9920ABBCZ datasheet(96/112 Pages) AD

96 / 112 page

AD9920A

Rev. B | Page 96 of 112

COMPLETE REGISTER LISTING

When an address contains fewer than 28 data bits, all remaining bits must be written as 0s.

Table 52. AFE Registers

Address

Data

Bits

Default

Value

Default

Update

Type

Name

Description

0x00

[1:0]

0x03

SCK

STANDBY

Standby modes.

0 = normal operation (full power).

1 = Standby1 mode.

2 = Standby2 mode.

3 = Standby3 mode (lowest power).

[2]

0x01

CLPENABLE

0 = disable OB clamp.

1 = enable OB clamp.

[3]

CLPSPEED

0 = select normal OB clamp settling.

1 = select fast OB clamp settling.

[4]

FASTUPDATE

0 = ignore CDS gain.

1 = very fast clamping when CDS gain is updated.

[5]

PBLK_LVL

0 = blank data outputs to 0 during PBLK.

1 = blank data outputs to programmed clamp level during PBLK.

[6]

DCBYP

0 = enable input dc restore circuit during PBLK.

1 = disable input dc restore circuit during PBLK.

0x01

[0]

SCK

DOUTDISABLE

0 = data outputs are driven.

1 = data outputs are three-stated.

[1]

DOUTLATCH

0 = latch data outputs using DOUTPHASE register setting.

1 = output latch is transparent.

[2]

GRAYEN

1 = enable gray coding of digital data output.

[3]

Test

Set to 0.

0x02

[0]

Test

Do not access, or set to 0.

0x03

[23:0]

0xFFFFFF

Test

Do not access, or set to 0xFFFFFF.

0x04

[2:0]

CDSGAIN

CDS gain setting.

0 = −3 dB.

4 = 0 dB.

6 = +3 dB.

7 = +6 dB.

All other values are invalid.

0x05

[9:0]

0x0F

VGAGAIN

VGA gain. 6 dB to 42 dB (0.035 dB per step).

0x06

[9:0]

0x1EC

CLAMPLEVEL

Optical black clamp level. 0 LSB to 255 LSB (0.25 LSB per step).

0x07

[27:0]

Test

Do not access, or set to 0.

0x08

[27:0]

Test

Do not access, or set to 0.

0x09

[27:0]

Test

Do not access, or set to 0.

0x0A

[27:0]

Test

Do not access, or set to 0.

0x0B

[27:0]

SCK

UNUSED

Do not access, or set to 0.

0x0C

[27:0]

SCK

Test

Do not access, or set to 0.

0x0D

[0]

CLIDIVIDE

0 = do not divide CLI frequency.

1 = divide CLI frequency by 2.

[7:1]

Test

Do not access, or set to 0.

0x0E

[7:0]

SCK

Test

Set to 0.

[8]

VDHD_IE

VD/HD input enable. Set to 1 to enable VD/HD inputs for slave mode.

0x0F

[27:0]

Test

Set to 0.

AD9920ABBCZ Datasheet(PDF) 96 Page - Analog Devices

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