WM8196

Production Data

w

PD Rev 4.6 October 2008

22

OPERATING MODES

Table 5 summarises the most commonly used modes, the clock waveforms required and the register

contents required for CDS and non-CDS operation.

MODE

DESCRIPTION

CDS

AVAILABLE

MAX

SAMPLE

RATE

SENSOR

INTERFACE

DESCRIPTION

TIMING

REQUIRE-

MENTS

REGISTER

CONTENTS

WITH CDS

REGISTER

CONTENTS

WITHOUT CDS

1

Colour

Pixel-by-Pixel

Yes

4MSPS

The 3 input

channels are

sampled in

parallel. The

signal is then

gain and offset

adjusted before

being

multiplexed into

a single data

stream and

converted by the

ADC, giving an

output data rate

of 12MSPS max.

MCLK max =

24MHz

MCLK: VSMP

ratio is 6:1

SetReg1:

03(hex)

SetReg1: 01(hex)

2

Monochrome/

Colour

Line-by-Line

Yes

4MSPS

As mode 1

except:

Only one input

channel at a time

is continuously

sampled.

MCLK max =

24MHz

MCLK: VSMP

ratio is 6:1

SetReg1:

07(hex)

SetReg1: 05(hex)

3

Fast

Monochrome/

Colour

Line-by-Line

Yes

8MSPS

Identical to mode

2

MCLK max =

24MHz

MCLK: VSMP

ratio is 3:1

Identical to

mode 2 plus

SetReg3:

bits 5:4 must

be set to

0(hex)

Identical to

mode 2

4

Maximum

speed

Monochrome/

Colour

Line-by-Line

No

12MSPS

Identical to mode

2

MCLK max =

24MHz

MCLK: VSMP

ratio is 2:1

CDS not

possible

SetReg1: 45(hex)

5

Slow Colour

Pixel-by-Pixel

Yes

3MSPS

Identical to mode

1

MCLK max =

24MHz

MCLK: VSMP

ratio is

2n:1, n

≥ 4

Identical to

mode 1

Identical to

mode 1

6

Slow

Monochrome/

Colour

Line-by-Line

Yes

3MPS

Identical to mode

2

MCLK max =

24MHz

MCLK: VSMP

ratio is

2n:1, n

≥ 4

Identical to

mode 2

Identical to

mode 2

Table 5 WM8196 Operating Modes

Notes:

1.

In Monochrome mode, SetReg3 bits 7:6 determine which input is to be sampled.

2.

For Colour Line-by-Line, set control bit LINEBYLINE. For input selection, refer to Table 4, Colour Selection

Description in Line-by-Line Mode.