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參數(shù)資料
| 型號： | M37271MF-231SP |
| 廠商： | Mitsubishi Electric Corporation |
| 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微機隱蔽字幕解碼器和屏幕顯示控制器 |
| 文件頁數(shù)： | 78/97頁 |
| 文件大?。?/td> | 1436K |
| 代理商： | M37271MF-231SP |
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MITSUBISHI MICROCOMPUTERS
M37271MF-XXXSP
M37271EF-XXXSP, M37271EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
78
RESET CIRCUIT
The M37271MF-XXXSP is reset according to the sequence shown
in Figure 90. It starts the program from the address formed by using
the content of address FFFF
16
as the high-order address and the
16
as the low-order address, when the
______
RESET pin is held at “L” level for 2
μ
s or more while the power source
voltage is 5 V
±
10 % and the oscillation of a quartz-crystal oscillator
or a ceramic resonator is stable and then returned to “H” level. The
internal state of microcomputer at reset are shown in Figures 3 to 7.
An example of the reset circuit is shown in Figure 89.
The reset input voltage must be kept 0.9 V or less until the power
source voltage surpasses 4.5 V.
Fig. 90. Reset sequence
Fig. 89. Example of reset circuit
X
IN
φ
RESET
Internal RESET
SYNC
Address
Data
32768 count of X
IN
clock cycle (Note 3)
Reset address from the vector table
01, S
01, S-1 01, S-2
FFFE
FFFF
AD
H
,
AD
L
AD
L
AD
H
Notes 1
:
f(X
IN
) and f(
φ
) are in the relation : f(X
IN
) = 2·f (
φ
).
2 :
A question mark () indicates an undefined state that
depends on the previous state.
3 :
Immediately after a reset, timer 3 and timer 4 are
connected in hardware. At this time, “FF
16
” is set
in timer 3 and “07
16
” is set to timer 4. Timer 3 counts down
with f(X
IN
overflow signal.
Power source voltage 0 V
Reset input voltage 0 V
4.5 V
0.9 V
Poweron
32
36
33
Vcc
RESET
Vss
M37271MF-XXXSP
1
5
4
3
0.1
μ
F
M51953AL
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| M37271MF-252SP | 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 |
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