WM8199
Production Data
OPERATING MODES
Table 4 summarises the most commonly used modes, the clock waveforms required and the register
contents required for CDS and non-CDS operation.
MODE
DESCRIPTION
CDS
MAX
SENSOR
INTERFACE
DESCRIPTION
TIMING
REQUIRE-
MENTS
REGISTER
CONTENTS
WITH CDS
REGISTER
CONTENTS
WITHOUT
CDS
AVAILABLE SAMPLE
RATE
1
Colour
Pixel-by-Pixel
Yes
6.67MSPS The 3 input channels
are sampled in
MCLK max
= 40MHz
SetReg1:
03(hex)
SetReg1:
01(hex)
parallel. The signal is
then gain and offset
adjusted before being
multiplexed into a
MCLK:
VSMP
ratio is 6:1
single data stream
and converted by the
ADC, giving an output
data rate of 20MSPS
max.
2
3
Monochrome/
Colour
Line-by-Line
Yes
Yes
6.67MSPS As mode 1 except:
Only one input
MCLK max
= 40MHz
SetReg1:
07(hex)
SetReg1:
05(hex)
channel at a time
is continuously
sampled.
MCLK:
VSMP
ratio is 6:1
Fast
Monochrome/
Colour
13.33MSPS Identical to mode 2
MCLK max
= 40MHz
Identical to
mode 2 plus
SetReg3:
bits 5:4 must
be set to
Identical to
mode 2
MCLK:
VSMP
ratio is 3:1
Line-by-Line
0(hex)
4
5
Maximum
speed
Monochrome/
Colour
No
20MSPS
5MSPS
Identical to mode 2
Identical to mode 1
MCLK max
= 40MHz
CDS not
possible
SetReg1:
45(hex)
MCLK:
VSMP
ratio is 2:1
Line-by-Line
Slow Colour
Pixel-by-Pixel
Yes
MCLK max
= 40MHz
Identical to
mode 1
Identical to
mode 1
MCLK:
VSMP
ratio is
2n:1, n ≥ 4
6
Slow
Monochrome/
Colour
Yes
5MSPS
Identical to mode 2
MCLK max
= 40MHz
Identical to
mode 2
Identical to
mode 2
MCLK:
VSMP
Line-by-Line
ratio is
2n:1, n ≥ 4
Table 4 WM8199 Operating Modes
Notes:
1.
2.
In Monochrome mode, SetReg3 bits 7:6 determine which input is to be sampled.
For Colour Line-by-Line, set control bit LINEBYLINE. For input selection, refer to Table 4, Colour Selection
Description in Line-by-Line Mode.
PD Rev 3.2 November 2003
20
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
