M66335FP Datasheet, PDF (1/57 Pages) Mitsubishi Electric Semiconductor – FACSIMILE IMAGE DATA PROCESSOR

MITMSIUTSBUISBHISI 〈_HDII〈GDIITGAILTAALSASSPS〉 _P〉
M663M36563F35PFP
FACFSAICMSILIMEILIMEAIMGEAGDEATDAAPTAROPRCOESCSEOSSROR
DESCRIPTION
The M66335 is a facsimile image processing controller to turn into
binary signals analog signals which have been output through photo-
electric conversion by the image sensor.
The image processing functions includes peak value detection,
uniformity correction, resolution change, MTF compensation, γ cor-
rection, detection of background/character levels, error diffusion,
separation of image zones, and designation of regions.
This controller contains not only the analog processing circuit, the A/
D converter of a 7-bit flash type and image processing memory, but
also the image sensor and the interface circuit to the CODEC (Coder
and Decoder). Therefore, this LSI alone is capable of image pro-
cessing.
FEATURES
• ^{High speed scan (max. 2 ms/line, typ. 5 ms/line)}
• ^{Compatibility with up to the B4 (8 pixels/mm, 16 pixels/mm) image}
sensor
• ^{Generation of control signals for the image sensor (CCD, CIS)}
For CCD: SH, CK1, CK2, RS
For the contact sensor (CIS): SH, CK1, CK2
• ^{Built-in analog processing circuit (equivalent to the M64291)}
Sample and hold circuit
Gain control circuit
Black level clamping circuit
Reference internal power supply for the A/D converter
PIN CONFIGURATION (TOP VIEW)
• ^{Built-in A/D converter of a 7-bit flash type}
• ^{Built-in image processing memories}
Uniformity correction memory, Line memory, Error memory, γ cor-
rection memory
• ^{External output interface for converted binary data}
Serial output (→ M66330)
DMA output
• ^{External output interface for multivalued data}
DMA transfer of data compensated for uniformity
• ^{Various image processing functions}
Uniformity correction
Resolution change from 50% to 200% (by the 1% step)
MTF compensation (2-dimensional processing, capable of correc-
tion for each character/photo)
γ correction (capable of correction for each character/photo)
Detection of background/character levels
Change to pseudo-halftone
• Error diffusion (64 tone steps through 6-bit processing)
• Organized dither (64 tone steps through the 8 × 8 matrix)
Image zone separation (2-dimensional processing)
• ^{5V single power supply}
APPLICATION
Facsimile, word processor and image scanner
MPU
INTERFACE
DMA
INTERFACE
SYSTEM CLOCK
NC 65
A0 → 66
A1 → 67
A2 → 68
A3 → 69
A4 → 70
CS → 71
RD → 72
WR → 73
RESET → 74
DAK → 75
DRQ ← 76
INT ← 77
SYSCK → 78
GND 79
NC 80
M66335FP
40 NC
39 DGND
38 DVCC
37 VBL ADC BLACK REFERENCE OUTPUT
36 VWL ADC WHITE REFERENCE OUTPUT
35 ← ADIN ADC INPUT
34 AVCC
33 Vri+ ADC WHITE REFERENCE INPUT
32 AGND
31 Vri- ADC BLACK REFERENCE INPUT
30 → BCMO _
29 ← BCMV _ CONTROL SIGNAL FOR
28 ← BCMI _ ANALOG SIGNAL
27 ← C2 _ PROCESSING
26 ← C1 _
25 NC
Outline 80P6N–A
NC: No Connection
1