TLC8044 Datasheet, PDF (18/32 Pages) Texas Instruments – 12-BIT ANALOG-TO-DIGITAL INTERFACE FOR CHARGE-COUPLED DEVICE IMAGE SENSORS FOR SCANNERS

TLC8044
12-BIT ANALOG-TO-DIGITAL INTERFACE FOR
CHARGE-COUPLED DEVICE IMAGE SENSORS FOR SCANNERS
SLAS128 – JUNE 1997
PRINCIPLES OF OPERATION
MCLK
VSMP
ÎÎÎÎÎÎ ^Input
Video
r1, g1, b1
Video
Sample
ADC Input
ADC
Sample
b0 ÏÏÏÏÏÏr1
MCLK
ÎÎÎÎÎÎÎ ^{r2, g2, b2}
g1
b1 ÏÏÏÏÏÏr2
(a) COLOR OPERATION
ÎÎÎÎÎÎÎÎ ^{r3, g3, b3}
g2
b2 ÏÏÏÏÏÏ
VSMP
ÎÎ _Input
ÎÎ ^Video
ÎÎ^mÎι ÎÎ
ÎÎÎÎ^m2 ÎÎÎÎÎÎÎÎ^m3 ÎÎÎÎÎÎ^mÎÎ⁴ ÎÎÎÎÎÎ^mÎÎ⁵ ÎÎÎÎÎÎ^mÎÎ⁶ ÎÎÎÎÎÎ^mÎÎ⁷ ÎÎ
Video
Sample
ADC Input
ADC
m0 _{ÏÏÏÏÏÏ}m1 _{ÏÏÏÏÏÏ}m2 _{ÏÏÏÏÏÏ}m_ÏÏ3 _{ÏÏÏÏ} m_ÏÏ4 _{ÏÏÏÏ} m5_{ÏÏÏÏÏÏ} m6_{ÏÏÏÏÏÏ}
Sample
(b) MONOCHROME OPERATION
Figure 11. Normal Mode Input Timing
MCLK
VSMP
Input
ÎÎÎÎÎÎÎÎÎÎÎÎ _Video
r1, g1, b1
Reset
Sample
Video
Sample
ADC Input
ADC
Sample
1
b0 ^{ÏÏÏÏÏÏ}r1
ÎÎÎÎÎÎ^r2,ÎÎ^g2,bÎβ ÎÎÎÎ
2
2
g1
b1 ^{ÏÏÏÏÏÏ}r2
ÎÎÎÎÎÎÎÎ^r3,ÎÎ^g3,bÎγ ÎÎÎÎ
3
3
g2
b2 ^{ÏÏÏÏÏÏ}
Video Sample 2 – Reset Sample 2
Figure 12. CDS Mode Input Timing
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