WM8215 datasheet(24/31 Pages) WOLFSON

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WM8215

Production Data

PD, Rev 4.3, September 2012

The following table describes the function of each of the control bits shown in Table 5

ADDRESS

<A5:A0>

BIT

NAME(S)

DEFAULT

DESCRIPTION

000001

(01h)

Setup Register

Global Enable

0 = complete power down,

1 = fully active (individual blocks can be disabled using

individual powerdown bits – see setup register 5).

CDS

Select correlated double sampling mode:

0 = single ended mode,

1 = CDS mode.

MONO

Sampling mode select

0 = other mode (2 or 3-channel)

1 = Monochrome (1-channel) mode. Input channel

selected by CHAN[1:0] register bits, unused channel is

powered down.

TWOCHAN and MONO should not be set concurrently

TWOCHAN

Sampling mode select

0 = other mode (1 or 3-channel)

1 = 2-channel mode. Inputs channels are Red and Green,

Blue channel is powered down.

TWOCHAN and MONO should not be set concurrently

5:4

PGAFS[1:0]

Offsets PGA output to optimise the ADC range for different

polarity sensor output signals. Zero differential PGA input

signal gives:

0x = Invalid option. Either ‘10’ or ‘11’ must be set.

10 = Full-scale positive output (OP=1023) – use for

negative going video.

NB, Set INVOP=1 if zero differential input should

give a zero output code with negative going

video.

11 = Full-scale negative output (OP=0) - use for positive

going video

7:6

Not Used

Must be set to 0

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