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參數(shù)資料
| 型號： | M38277M8MXXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件頁數(shù)： | 42/70頁 |
| 文件大?。?/td> | 1112K |
| 代理商： | M38277M8MXXXFP |
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47
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
3827 Group
Fig. 54 State transitions of system clock
Low-power dissipation
mode (f(
φ) =16 kHz)
Notes 1 : Switch the mode by the allows shown between the mode blocks. (Do not switch between the mode directly without an allow.)
2 : The all modes can be switched to the stop mode or the wait mode and returned to the source mode when the stop mode or the wait mode is ended.
3 : Timer and LCD operate in the wait mode.
4 : When the stop mode is ended, wait time can be set by connecting timer 1 and timer 2 in middle-/high-speed mode.
5 : When the stop mode is ended, wait time can be set by connecting timer 1 and timer 2 in low-speed mode.
6 : Wait until oscillation stabilizes after oscillating the main clock X IN before the switching from the low-speed mode to middle-/high-speed mode.
7 : The example assumes that 8 MHz is being applied to the X IN pin and 32 kHz to the XCIN pin.
φ indicates the internal clock.
CM4 : Port Xc switch bit
0: I/O port function
1: XCIN–XCOUT oscillating function
CM5 : Main clock (XIN–XOUT) stop bit
0: Oscillating
1: Stopped
CM6 : Main clock division ratio selection bit
0: f(XIN)/2 (high-speed mode)
1: f(XIN)/8 (middle-speed mode)
CM7 : Internal system clock selection bit
0: XIN–XOUT selected
(middle-/high-speed mode)
1: XCIN–XCOUT selected
(low-speed mode)
CPU mode register
(CPUM : address 003B16)
b7
b4
Reset
CM6
“0”
“1”
CM
4
“0”
“1”
CM7=0(8 MHz selected)
CM6=1(Middle-speed)
CM5=0(8 MHz oscillating)
CM4=0(32 kHz stopped)
Middle-speed mode (f(
φ) =1 MHz)
CM7=0(8 MHz selected)
CM6=1(Middle-speed)
CM5=0(8 MHz oscillating)
CM4=1(32 kHz oscillating)
Middle-speed mode (f(
φ) =1 MHz)
CM7=0(8 MHz selected)
CM6=0(High-speed)
CM5=0(8 MHz oscillating)
CM4=0(32 kHz stopped)
High-speed mode (f(
φ) =4 MHz)
CM7=0(8 MHz selected)
CM6=0(High-speed)
CM5=0(8 MHz oscillating)
CM4=1(32 kHz oscillating)
High-speed mode (f(
φ) =4 MHz)
CM7=1(32 kHz selected)
CM6=1(Middle-speed)
CM5=0(8 MHz oscillating)
CM4=1(32 kHz oscillating)
Low-speed mode (f(
φ) =16 kHz)
CM7=1(32 kHz selected)
CM6=0(High-speed)
CM5=0(8 MHz oscillating)
CM4=1(32 kHz oscillating)
Low-speed mode (f(
φ) =16 kHz)
Low-power dissipation
mode (f(
φ) =16 kHz)
CM7=1(32 kHz selected)
CM6=1(Middle-speed)
CM5=1(8 MHz stopped)
CM4=1(32 kHz oscillating)
CM7=1(32 kHz selected)
CM6=0(High-speed)
CM5=1(8 MHz stopped)
CM4=1(32 kHz oscillating)
CM6
“0”
“1”
CM6
“0”
“1”
CM6
“0”
“1”
CM
4
“0”
“1”
CM
7
“0”
“1”
CM
7
“0”
“1”
CM
5
“0”
“1”
CM
5
“0”
“1”
CM
4
CM
6
“0”
“1”
“0”
“1”
CM
4
CM
6
“0”
“1”
“0”
CM
5
CM
6
“0”
“1”
“0”
“1”
CM
5
CM
6
“0”
“1”
“0”
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