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參數(shù)資料
| 型號： | M37274MA |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | Single Chip 8 Bits Microcomputer(8位單片機) |
| 中文描述： | 單芯片8位單片機（8位單片機） |
| 文件頁數(shù)： | 42/131頁 |
| 文件大?。?/td> | 2049K |
| 代理商： | M37274MA |
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42
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274MA-XXXSP
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
Fig. 40. Sync Pulse Counter Register
(12) Synchronous Signal Counter
The synchronous signal counter counts the composite sync signal
taken out from a video signal in the data slicer circuit or the vertical
synchronous signal V
sep
as a count source.
The count value in a certain time (T time) generated by f(X
IN
)/2
13
or
f(X
IN
)/2
13
is stored into the 5-bit latch. Accordingly, the latch value
changes in the cycle of T time. When the count value exceeds “1F
16
,”
“1F
16
” is stored into the latch.
The latch value can be obtained by reading out the sync pulse counter
register (address 020F
16
). A count source is selected by bit 5 of the
sync pulse counter register.
The synchronous signal counter is used when bit 0 of PWM mode
register 1 (address 02EA
16
).
Figure 40 shows the structure of the sync pulse counter and Figure
41 shows the synchronous signal counter block diagram.
Fig. 41. Synchronous Signal Counter Block Diagram
Sync pulse counter register
(SYC : address 020F
16
)
Count value
Count source
Count time
0: H
SYNC
signal
1: Composite
sync signal
f(X
IN
)/2
13
(1024
s, f(X
IN
) = 8 MHz)
7
0
Reset
5-bit counter
Latch (5 bits)
f(X
IN
)/2
13
Composite
sync signal
H
SYNC
signal
Counter
Sync pulse
counter register
Data bus
Selection gate : connected to black
colored side when
reset.
b5
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|---|---|
| M37274MA-052SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37274MA-053SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37274MA-082SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37274MA-084SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37274MA-XXXSP | 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 |
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