1
M66335FP
FAFACSIMILE IMAGE DATA PROCESSOR
MIMITSUBISHI
DIDIGITAL ASSP
NC
A0
A1
A2
A3
A4
CS
RD
WR
RESET
DAK
DRQ
INT
SYSCK
GND
NC
MPU
INTERFACE
DMA
INTERFACE
SYSTEM CLOCK
NC
DGND
DVCC
VBL
ADC BLACK REFERENCE OUTPUT
VWL
ADC WHITE REFERENCE OUTPUT
ADIN
ADC INPUT
AVCC
Vri+
ADC WHITE REFERENCE INPUT
AGND
Vri-
ADC BLACK REFERENCE INPUT
BCMO
BCMV
BCMI
C2
C1
NC
CONTROL SIGNAL FOR
ANALOG SIGNAL
PROCESSING
N
G
V
C
D
D
D
D
D
D
D
D
G
V
C
T
←
T
←
T
←
T
←
T
←
T
←
T
←
T
←
T
→
V
C
G
M
I
T
N
N
V
C
A
S
S
S
S
P
G
V
C
R
C
C
S
G
V
C
A
C
A
L
A
A
G
P
N
N
M66335FP
6
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
6
6
6
6
5
5
5
5
5
5
5
5
5
5
4
4
4
4
4
4
4
4
4
1
2
3
4
←
5
←
6
←
7
←
8
→
9
←
1
1
1
←
1
←
1
←
1
←
1
1
1
1
→
2
→
2
2
←
2
2
←
→
←
←
←
←
→
→
→
→
→
→
→
→
→
→
←
←
→
I
I
S
C
C
S
I
S
C
S
PIN CONFIGURATION (TOP VIEW)
Outline 80P6N–A
NC: No Connection
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
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