WM8150 datasheet(21/24 Pages) WOLFSON

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Production Data

WM8150

PD Rev 3.0 November 2002

BIT

NAME(S)

DEFAULT

DESCRIPTION

VSMPDET

0 = Normal operation, signal on VSMP input pin is applied directly to

Timing Control block.

1 = Programmable VSMP detect circuit is enabled. An internal

synchronisation pulse is generated from signal applied to VSMP input pin

and is applied to Timing Control block.

3:1

VDEL[2:0]

000

When VSMPDET = 0 these bits have no effect.

When VSMPDET = 1 these bits set a programmable delay from the

detected edge of the signal applied to the VSMP pin. The internally

generated pulse is delayed by VDEL MCLK periods from the detected

edge.

See Figure 14, Internal VSMP Pulses Generated for details.

Setup

POSNNEG

When VSMPDET = 0 this bit has no effect.

When VSMPDET = 1 this bit controls whether positive or negative edges

are detected:

0 = Negative edge on VSMP pin is detected and used to generate internal

timing pulse.

1 = Positive edge on VSMP pin is detected and used to generate internal

timing pulse.

See Figure 14 for further details.

0 = Normal Operation, OP[3:0] output ADC data.

1 = Internal Clock Test Mode. This allows internal timing signals to be

multiplexed onto the OP[3:0] pins as follows.

TCLK=0

TCLK=1

OP[3]

INTVSMP

OP[2]

Video sample clock

OP[1]

ADC clock

Test

7TCLK

OP[0]

Reset sample clock

Offset DAC

(Red)

7:0

DACR[7:0]

Red channel offset DAC value. Used under control of the INTM[1:0]

control bits.

Offset DAC

(Green)

7:0

DACG[7:0]

Green channel offset DAC value. Used under control of the INTM[1:0]

control bits.

Offset DAC

(Blue)

7:0

DACB[7:0]

Blue channel offset DAC value. Used under control of the INTM[1:0]

control bits.

Offset DAC

(RGB)

7:0

DAC[7:0]

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

registers to be overwritten by the new value

PGA gain

(Red)

7:0

PGAR[7:0]

Determines the gain of the red channel PGA according to the equation:

Red channel PGA gain = [0.78+(PGAR[7:0]*7.57)/255]. Used under

control of the INTM[1:0] control bits.

PGA gain

(Green)

7:0

PGAG[7:0]

Determines the gain of the green channel PGA according to the equation:

Green channel PGA gain = [0.78+(PGAG[7:0]*7.57)/255]. Used under

control of the INTM[1:0] control bits.

PGA gain

(Blue)

7:0

PGAB[7:0]

Determines the gain of the blue channel PGA according to the equation:

Blue channel PGA gain = [0.78+(PGAB[7:0]*7.57)/255]. Used under

control of the INTM[1:0] control bits.

PGA gain

(RGB)

7:0

PGA[7:0]

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

registers to be overwritten by the new value

Table 5 Register Control Bits

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