WM8215 datasheet(25/31 Pages) WOLFSON

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WM8215

Production Data

PD, Rev 4.3, September 2012

ADDRESS

<A5:A0>

BIT

NAME(S)

DEFAULT

DESCRIPTION

000010

(02h)

Setup Register

1:0

Not Used

Must be set to 0

INVOP

Digitally inverts the polarity of output data.

0 = negative going video gives negative going output,

1 = negative-going video gives positive going output data.

OPD

Output Disable. This works with the OEB pin to control the

output pins.

0=Digital outputs enabled, 1=Digital outputs high

impedance

OEB

(pin)

OPD

OP pins

Enabled

High Impedance

LOWREFS

Reduces the ADC reference range (2*[VRT-VRB]), thus

changing the max/min input video voltages (ADC ref

range/PGA gain).

0 = ADC reference range = 2.0V

1 = ADC reference range = 1.2V

RLCDACRNG

Sets the output range of the RLCDAC.

0 = RLCDAC ranges from 0 to AVDD (approximately),

1 = RLCDAC ranges from 0 to VRT (approximately).

7:6

DEL[1:0]

Controls the latency from sample to data appearing on

output pins

DEL

Latency

7 MCLK periods

8 MCLK periods

9 MCLK periods

10 MCLK periods

000011

(03h)

Setup Register

3:0

RLCDAC[3:0]

1111

Controls RLCDAC driving VRLC/VBIAS pin to define single

ended signal reference voltage or Reset Level Clamp

voltage. See Electrical Characteristics section for ranges.

Reserved

Must be set to one

Reserved

Must be set to zero

7:6

CHAN[1:0]

When MONO=0 this register bit has no effect

Monochrome mode channel select.

00 = Red

channel select

01 = Green

channel select

10 = Blue channel select

11 = Reserved

000100

(04h)

Software Reset

Any write to Software Reset causes all cells to be reset. It

is recommended that a software reset be performed after a

power-up before any other register writes.

000101

(05h)

Auto-cycle

Reset

Any write to Auto-cycle Reset causes the auto-cycle

counter to reset to RINP. This function is only required

when LINEBYLINE = 1.

000110

(06h)

Setup Register

LINEBYLINE

Selects line by line operation. Line by line operation is

intended for use with systems which operate one line at a

time but with up to three colours shared on that one output.

0 = normal operation,

1 = line by line operation.

When line by line operation is selected MONO is forced to

1 and CHAN[1:0] to 00 internally, ensuring that the correct

internal timing signals are produced. Green and Blue PGAs

are also disabled to save power.

WM8215 Datasheet(PDF) 25 Page - Wolfson Microelectronics plc

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