S7R77021

EPSON

CCD/CIS Signal Processor with Timing Generator

OVERVIEW

S7R77021 is an analog front end IC equipped with CCD drive clock generation function that provides high-speed read

rate. This IC incorporates three high-resolution 16bit A/D converters and has control function that drives a shutter-less

CCD. Since this IC adopts RSDS to image data output, it is able to reduce radiation noise. By using this LSI, it easily

provides a scanner system that offers the high quality image.

FEATURES

• 16bit, A/D converter 3-channel

• Maximum image data transfer rate (AFE transfer clock): 30MHz

• Maximum 3-channel input (color 3-channel, monochrome 2-channel (odd/even), monochrome 1-channel)

• Analog power input range: 2Vp-p(Full-scale input range to A/D converter: 1Vp-p)

• Programmable gain amp

Gain adjustable range: -6.9dB(0.45-times) to +12.0dB(4.0-times), 6bit resolution

• Programmable offset range: -250mV to +250mV, 8bit resolution

• Built-in CCD/CIS drive clock and AFE drive clock generation function

• 3-line serial interface

• 8bit x 2 multiplex image data output (Low amplitude differential output)

• Package PFBGA121pin (0.8mm pitch) or QFP100pin (0.5mm pitch)

• 3.3V single power supply

• Includes PLL for clock generation (4 to 16-multiplication)

• Internal reference clock frequency: 75MHz < External clock frequency < 120MHz

BLOCK DIAGRAM

APPLICATIONS

Scanner, MFP, Copy-machine, FAX etc.

CLMPLV/

INN

XRST,

TSTEN,

TMOD1,

TMOD2

TxSYNC+,TxSYNC-,

TxD0(～7)+

TxD0(～7)-

SNCK1A～1D,

SNCK2～4,AFECK1～4

SHR,SHG,SHB,

SH,TGCK

Gain Registers

CLKIN

Offset Registers

CLKINP,

CLKINN

LPF

XCS SCLK SDIO

BINP

REFN

CM1

REFP

CM2

ANAMON

AVDD

TR(G,B)P,TR(G,B)N

VSS

VDD

AGND

REXT

RxCLK+, RxCLK-

RINP

GINP

D0(～7）、SYNC

MUX

8bit

DAC

8bit

DAC

8bit

DAC

8

16bit ADC

8

CLAMP

Timing Generator

BandGAP

Reference

RED

GREEN

BLUE

RED

GREEN

BLUE

6

CDS

PGA

CDS

PGA

CDS

PGA

Host Interface

16bit ADC

16bit ADC

16

16

16

RSDS

-TX

RSDS-RX

PLL