參數(shù)資料
型號： M37274MA-053SP
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)： 102/147頁
文件大?。?/td> 2042K
代理商： M37274MA-053SP
102
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274EFSP
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
RESET CIRCUIT
When the oscillation of a quartz-crystal oscillator or a ceramic reso-
RESET pin at LOW for 2 μs or more, then return is to HIGH. Then, as
shown in Figure 106, reset is released and the program starts form
the address formed by using the content of address FFFF
16
as the
high-order address and the content of the address FFFE
16
as the
low-order address. The internal state of microcomputer at reset are
shown in Figures 5 to 9.
An example of the reset circuit is shown in Figure 105.
The reset input voltage must be kept 0.9 V or less until the power
source voltage surpasses 4.5 V.
Fig. 106. Reset Sequence
Fig. 105. 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
:
2 :
3 :
f(X
IN
) and f( ) are in the relation : f(X
IN
) = 2·f (
φ
A question mark () indicates an undefined state that
depends on the previous state.
Immediately after a reset, timer 3 and timer 4 are
connected by 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
)/16, and reset state is released by the timer 4
overflow signal.
).
Power source voltage 0 V
Reset input voltage 0 V
4.5 V
0.9 V
Poweron
26
30
27
Vcc
RESET
Vss
M37274EFSP
1
5
4
3
0.1
μ
F
M51953AL
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