參數(shù)資料
型號(hào): M37270MF-106SP
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(jī)隱蔽字幕解碼器和屏幕顯示控制器
文件頁數(shù): 75/94頁
文件大小: 1551K
代理商: M37270MF-106SP
MITSUBISHI MICROCOMPUTERS
M37270MF-XXXSP
M37270EF-XXXSP, M37270EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
75
RESET CIRCUIT
The M37270MF-XXXSP is reset according to the sequence shown
in Figure 87. It starts the program from 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, when the
RESET pin is held at “L” level for 2
m
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 Figure 88.
An example of the reset circuit is shown in Figure 86.
The reset input voltage must be kept 0.9 V or less until the power
source voltage surpasses 4.5 V.
Fig. 87. Reset sequence
Fig. 86. Example of reset circuit
Power source voltage 0 V
Reset input voltage 0 V
4.5 V
0.9 V
Poweron
32
36
33
Vcc
RESET
Vss
M37270MF-XXXSP
1
5
4
3
0.1
F
M51953AL
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.
Immediately after a reset, timer 3 and timer 4 are
connected in hardware. At this time, “FF
in timer 3 and “07
with f(X
overflow signal.
16
” is set
16
” is set to timer 4. Timer 3 counts down
IN
)/16, and reset state is released by the timer 4
3:
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