WM8224 datasheet(45/50 Pages) CIRRUS

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WM8224

Production Data

PD, Rev 4.2, September 2013

NAME

BIT

NAME(S)

DEFAULT

DESCRIPTION

R9 (09h)

BLC Red

Target

7:0

TARGETR

[7:0]

00000000

Target Black-Level code for Red channel. Please see the

Target Codes Section for details.

R10 (0Ah)

BLC Green

Target

7:0

TARGETG

[7:0]

00000000

Target Black-Level code for Green channel. Please see

the Target Codes Section for details.

R11 (0Bh)

BLC Blue

Target

7:2

TARGETB

[7:0]

00000000

Target Black-Level code for Blue channel. Please see the

Target Codes Section for details.

R12 (0Ch)

BLC Control

1:0

TG_METHOD

[1:0]

Determines the start-of-line method to be used.

00 = TG_REG method

01 = Not a valid option

10 = OEB/TG shared pin method, +ve edge triggered

11 = OEB/TG shared pin method, -ve edge triggered

TG_REG

automatically set to zero after it has been clocked by the

BLC.

FSCALE_

REL

Inverts the Black-level target codes so they are relative to

fullscale.

RESERVED

Set to zero

6:5

RESERVED

Set to zero

STATE_OUT

Outputs the 2-bit state of the BLC onto OP0 and OP1.

R13 (0Dh)

BLC Control

2:0

CADUR[2:0]

000

Controls the number of Coarse Adjust iterations to be

performed.

FA_EN

Enables the Fine Adjust operation

7:4

RESERVED

0000

Set to zero

R14 (0Eh)

BLC Control

FRAME_

START

the first line in a frame. This register is automatically set

to zero at the end of the BLC operation on the first line.

SEQ_START

the first line of the first frame in a frame-sequence. This

operation on the first line.

FRAME_SEQ

Indicates that the BLC is to be used in a sequence of

frames

FA_ACCUM

Makes the Fine Adjust calibration accumulate a result over

multiple lines.

FA_

EVERYLINE

0 = Fine Adjust only used on the 1

st line of a frame

1 = Fine Adjust used on every line of a frame

CA_

EVERYLINE

0 = Coarse Adjust only used on the 1

st line of a frame

1 = Coarse Adjust used on every line of a frame

7:6

BPIX_AVAIL

[9:8]

MSBs of the number of Black-pixels available over which

to perform the Coarse and/or Fine Adjust Calibration.

R15 (0Fh)

BLC Control

7:0

BPIX_AVAIL

[7:0]

00000000

LSBs of the number of Black-pixels available over which to

perform the Coarse and/or Fine Adjust Calibration.

R32 (20h)

Offset DAC

(Red)

7:0

DACR[7:0]

10000000

Red channel 8-bit offset DAC value (mV) =

250*(DACR[7:0]-127.5)/127.5

R33 (21h)

Offset DAC

(Green)

7:0

DACG[7:0]

10000000

Green channel 8-bit offset DAC value (mV) =

250*(DACG[7:0]-127.5)/127.5

R34 (22h)

Offset DAC

(Blue)

7:0

DACB[7:0]

10000000

Blue channel 8-bit offset DAC value (mV) =

250*(DACB[7:0]-127.5)/127.5

R35 (23h)

Offset DAC

(RGB)

7:0

DACRGB[7:0]

A write to this register location causes the red, green and

blue offset DAC registers to be overwritten by the new

value

R36 (24h)

PGA Gain

LSB

(Red)

PGAR[0]

This register bit forms the LSB of the red channel PGA

gain code. PGA gain is determined by combining this

28 hex.

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