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參數(shù)資料
| 型號： | M66335FP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | FACSIMILE IMAGE DATA PROCESSOR |
| 中文描述： | 傳真寄發(fā)圖像數(shù)據(jù)處理器 |
| 文件頁數(shù)： | 13/57頁 |
| 文件大?。?/td> | 656K |
| 代理商： | M66335FP |
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13
MITSUBISHI
DIGITAL ASSP
M66335FP
FACSIMILE IMAGE DATA PROCESSOR
G
Resolution change
Resolution change is controlled through H/W in the horizontal scan-
ning direction and through S/W in the vertical scanning direction.
The sequence for resolution change is shown in Fig. 8.
`
Horizontal scanning direction
The scaling factor is written from the register 15 (CNV_D) to the
built-in resolution change memory (100W
×
1 bit) bit by bit by 100
operations.
MSSEL of the register 6 must be set at “0” (which specifies the hori-
zontal scanning direction) before the scaling factor is written in the
memory.
The procedure to specify CNV_D is as follows.
N
In the case of reduction
Data written in the resolution change memory have the following
meaning.
“0”: 1 pixel is output.
“1”: No pixel is output.
(Example of reduction to 75%)
75 0’s and 25 1’s are written in the memory. The intervals of 1’s
should be as equal as possible to obtain the image with better qual-
ity.
N
In the case of enlargement
Data written in the resolution change memory have the following
meaning.
“0”: 1 pixel is output.
“1”: 2 pixels are output.
(Example of enlargement to 150%)
50 0’s and 50 1’s are written in the memory. The intervals of 1’s
should be as equal as possible to obtain the image with better quality
as in the reduction.
`
Vertical scanning direction
Processing of lines to implement the scaling factor in the vertical
scanning direction is decided for each line through the register.
MSSEL of the register 6 must be set at “1” (which specifies the verti-
cal scanning direction), and either “0” or “1” written in the register 15
(CNV_D) before the processing of each line.
The timing for this setting is in the period between the first transition
of the INT signal (synchronized with that of ACCK) and that of the
SH signal (the start of taking the SRDY signal in).
The procedure to specify CNV_D is as follows.
N
In the case of reduction
CNV_D indicates the current line read.
“0”: 1 line of data are output.
“1”: No line of data are output.
N
In the case of enlargement
CNV_D indicates the next line read.
“0”: 1 line of data are output with PTIM generated (paper driven).
“1”: 1 line of data are output with PTIM generated (paper not driven).
(Paper not driven: the same line is read again.)
Resolution change
END
YES
YES
NO
NO
Enlargement/reduction
is set in CONVX/CONVY.
MSSEL is set at 0.
Data setting in CNV_D
(100 bits in quantity)
MSSEL is set at 1.
Specifying enlargement/reduction
for horizontal/vertical scanning
Setting the scaling factor for
resolution change in the
horizontal scanning direction
Setting the scaling factor for
resolution change in the vertical
scanning direction
Specifying horizontal scanning
Start of reading a single line
End of reading a single line
Specifying vertical scanning
Data setting in CNV_D
(1 bit in quantity)
Setting of SRDY
INT generated
Page end
Fig. 8 Sequence of resolution change setting
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