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參數(shù)資料
| 型號： | MB90F947APF |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 3.35 MM HEIGHT, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件頁數(shù)： | 29/57頁 |
| 文件大?。?/td> | 1586K |
| 代理商： | MB90F947APF |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7544 Group
MITSUBISHI MICROCOMPUTERS
35
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Som
e parametric
limits
are
subject
to change.
q Oscillation stop detection circuit (Note)
The oscillation stop detection circuit is used for reset occurrence
when a ceramic resonator or an oscillation circuit stops by discon-
nection. When internal reset occurs, reset because of oscillation
stop can be detected by setting “1” to the oscillation stop detection
status bit.
Also, when using the oscillation stop detection circuit, a built-in
ring oscillator is required.
Figure 46 shows the state transition.
Note: The oscillation stop detection circuit is not included in the
emulator MCU “M37544RSS”.
Fig. 43 Structure of MISRG
MISRG(address 003816, initial value: 0016)
b7
b0
Oscillation stabilization time set bit after
release of the STP instruction
0: Set “0116” in timer1, and “FF16”
in prescaler 1 automatically
1: Not set automatically
Ceramic / quartz-crystal or RC oscillation
stop detection function active bit
0: Detection function inactive
1: Detection function active
Reserved bits (return “0” when read)
(Do not write “1” to these bits)
Disable (return “0” when read)
Oscillation stop detection status bit
0: Oscillation stop not detected
1: Oscillation stop detected
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