WM8215

Production Data

w

PD, Rev 4.3, September 2012

22

NORMAL OPERATING MODES

Table 3 below shows the normal operating modes of the device. The MCLK speed can be specified

along with the MCLK:VSMP ratio to achieve the desired sample rate.

NUMBER

OF

CHANNELS

DESCRIPTION

CDS

AVAILABLE

MAXIMUM

SAMPLE RATE

TIMING

REQUIREMENTS

CHANNEL

MODE

SETTINGS

3

Three channel

Pixel-by-Pixel

YES

20 MSPS

MCLK max = 60MHz

Minimum MCLK:VSMP

ratio = 3:1

MONO = 0

TWOCHAN = 0

2

Two channel

Pixel-by-Pixel

YES

30 MSPS

MCLK max = 60MHz

Minimum MCLK:VSMP

ratio = 2:1

MONO = 0

TWOCHAN = 1

1

One channel

Pixel-by-Pixel

YES

45 MSPS

MCLK max = 45MHz

Minimum MCLK:VSMP

ratio = 1:1

MONO = 1

TWOCHAN = 0

Table 3 WM8215 Normal Operating Modes

Note: In one channel mode the WM8215 can operate at 60MHz but DNL/INL values cannot be

guaranteed.

Table 4 below shows the different channel mode register settings required to operate the 8215 in 1, 2

and 3 channel modes.

MONO

TWOCHAN

CHAN[1:0]

MODE DESCRIPTION

0

0

XX

3-channel (colour mode)

0

1

XX

2-channel (Blue PGA disabled)

1

0

00

1-channel (monochrome) mode.

Red channel selected, Green and Blue PGAs disabled.

1

0

01

1-channel (monochrome) mode.

Green channel selected, Red and Blue PGAs disabled.

1

0

10

1-channel (monochrome) mode.

Blue channel selected, Red and Green PGAs disabled.

1

0

11

Invalid mode

1

1

XX

Invalid mode

Table 4 Sampling Mode Summary

Note: Unused input pins should be connected to AGND, unless reset level clamping is used.