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參數(shù)資料
| 型號： | M37151M6-XXXFP |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| 中文描述： | 單芯片8位CMOS微機(jī)隱蔽字幕解碼器和屏幕顯示控制器 |
| 文件頁數(shù)： | 72/139頁 |
| 文件大?。?/td> | 1491K |
| 代理商： | M37151M6-XXXFP |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
M37151M6/M8/MA/MC/MF-XXXFP, M37151EFFP
71
Rev 1.0
8.11.4 Field Determination Display
When displaying a block with vertical dot size of 1/2H, the differ-
ences in the synchronizing signal waveform of the interlacing system
determine whether the field is odd or even. The dot lines 0 and 1
(refer to Figure 8.11.15), corresponding to each field, are displayed
alternately.
In the following, the field determination standard for the case where
both the horizontal sync signal and the vertical sync signal are nega-
tive-polarity inputs will be explained. A field determination is deter-
mined by detecting the time from a falling edge of the horizontal sync
signal until a falling edge of the V
SYNC
control signal (refer to Figure
8.11.6) in the microcomputer and then comparing this time with the
time of the previous field. When the time is longer than the previous
time, it is regarded as an even field. When the time is shorter, it is
regarded as an odd field
The contents of this field can be read out by the field determination
flag (bit 6 of the I/O polarity control register at address 00D8
16
). A dot
line is specified by bit 5 of the I/O polarity control register (refer to
Figure 8.11.15).
However, the field determination flag read out from the CPU is fixed
to “0” for even fields or “1” for odd fields, regardless of bit 5.
Fig. 8.11.14 I/O Polarity Control Register
0
0 :
“
”
at even field
“
”
at odd field
1 :
“
”
at even field
“
”
at odd field
b7 b6 b5 b4 b3 b2 b1 b0
I/O polarity control register (PC) [Address 00D8
16
]
B
Name
Functions
After reset
R W
I/O Polarity Control Register
0
H
SYNC
input polarity
switch bit (PC0)
0 : Positive polarity input
1 : Negative polarity input
0
1
0 : Positive polarity input
1 : Negative polarity input
0
2
R, G, B output polarity
switch bit (PC2)
0 : Positive polarity output
1 : Negative polarity output
0
3
OUT1 output polarity
switch bit (PC3)
0 : Positive polarity output
1 : Negative polarity output
0
5
Display dot line selection
bit (PC5) (See note)
0
6
Field determination flag
(PC6)
0 : Even field
1 : Odd field
1
4, 7
0
V
SYNC
input polarity
switch bit (PC1)
R W
R W
R W
R W
R W
R
—
R W
Fix these bits to
“
0.
”
Note:
Refer to the corresponding figure. 8.11.15
0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37151M8 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37151M8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37151MA | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37151MA-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37151MC | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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