WM8143-12 データシートの表示（PDF） - Wolfson Microelectronics plc

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WM8143-12

12-bit/4MSPS CCD Signal Processor

Wolfson Microelectronics plc 

WM8143-12

System Description

COLOUR CCD

SENSOR

BUFFERING

FOR CCD

RED

GREEN

RINP

OP[11:0]

WM8143-12

GINP

OEB

SDI/DNA

SCK/RNW

SEN/STB

NRESET

BLUE

BINP

VSMP

MCLK

RLC

Production Data

PARALLEL

DATA I/O

CONTROL/SERIAL

DATA IN

ANALOGUE

INTERFACE TIMING

Figure 1 System Diagram

The WM8143-12 signal processing IC interfaces

typically via buffering and AC coupling to the output of

CCD image sensors. The WM8143-12 also interfaces

to CIS image sensors via DC coupling.

Analogue output signals from the image sensor are

sampled, amplified and offset-corrected by the IC

before being converted into digital form by an on-board

high-speed 12-bit resolution analogue to digital

converter. Figure 1 illustrates a typical system

implementation where the three colour outputs from the

CCD image sensor are buffered and AC coupled to the

analogue inputs of the WM8143-12.

The digital interface to the WM8143-12 can be divided

into three distinct sections: -

• Parallel Data I/O

• Digital Control/Serial Timing

• Analogue Interface Timing

These sections are constructed for ease of use by the

system designer and are described in detail on the

following pages of this datasheet.

Wolfson Microelectronics

8

PD. Rev 4 Nov. 99

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