Toshiba e-studio212 - CCD Control Circuit

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SCANNER
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6.5.2 CCD control circuit
On the contact image sensor (CIS) unit, CCD (Charge Coupled Device) is mounted as the
optoelectronic element for converting the light reflected on the original into electrical signals (analog
signals). CCD is driven by the clock signals output from the SoC on the MAIN board, and then it divides
the photoelectric-converted analog signals into four output signals and outputs to the AFE. The AFE
converts the analog signals into 8-bit digital signals and outputs to the SoC.
Fig. 6-5
SoC
AFE
CCD
MAIN board Contact image sensor unit
+5V
SH TRCLCK
CK2B MCLCK
RS RSCLCK
CDIN1
CDIN2
CDIN3
CDIN4
SCNIMGA[0]
SCNIMGA[1]
SCNIMGA[2]
SCNIMGA[3]
SCNIMGA[4]
SCNIMGA[5]
SCNIMGA[6]
SCNIMGA[7]
IMGDTA[0]
IMGDTA[1]
IMGDTA[2]
IMGDTA[3]
IMGDTA[4]
IMGDTA[5]
IMGDTA[6]
IMGDTA[7]