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參數資料
| 型號： | M37221EFSP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| 中文描述： | 單芯片8位CMOS微機電壓合成與屏幕顯示控制器 |
| 文件頁數： | 46/61頁 |
| 文件大?。?/td> | 1386K |
| 代理商： | M37221EFSP |
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MITSUBISHI MICROCOMPUTERS
M37221M6-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
46
or a ceramic resonator is stable and then returned to “H” level. The
internal state of microcomputer at reset are shown in Figure 51.
An example of the reset circuit is shown in Figure 50.
The reset input voltage must be kept 0.6 V or less until the power
source voltage surpasses 4.5 V.
Fig. 49. Reset sequence
Fig. 50. Example of reset circuit
Power source voltage 0 V
Reset input voltage 0 V
4.5 V
0.6 V
Poweron
21
25
22
Vcc
RESET
Vss
M37221M6-XXXSP
1
5
4
3
0.1 μF
M51953AL
RESET CIRCUIT
The M37221M6-XXXSP is reset according to the sequence shown
in Figure 49. 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
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
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
)/16, and reset state is released by the timer 4
overflow signal.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| M37221FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37221M4H | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37221M4H-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37221M4H-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37221M6 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
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