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參數(shù)資料
| 型號(hào)： | M38270M8-XXXFP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機(jī) |
| 文件頁數(shù)： | 47/70頁 |
| 文件大小： | 1112K |
| 代理商： | M38270M8-XXXFP |
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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)
CM
7
=1(32 kHz selected)
CM
6
=0(High-speed)
CM
5
=1(8 MHz stopped)
CM
4
=1(32 kHz oscillating)
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 X
CIN
pin.
φ
indicates the internal clock.
CM
4
: Port Xc switch bit
0: I/O port function
1: X
CIN
–X
COUT
oscillating function
CM
5
: Main clock (X
IN
–X
OUT
) stop bit
0: Oscillating
1: Stopped
CM
6
: Main clock division ratio selection bit
0: f(X
IN
)/2 (high-speed mode)
1: f(X
IN
)/8 (middle-speed mode)
CM
7
: Internal system clock selection bit
0: X
IN
–X
OUT
selected
(middle-/high-speed mode)
1: X
CIN
–X
COUT
selected
(low-speed mode)
CPU mode register
(CPUM : address 003B
16
)
b7
b4
Reset
CM
6
“1”
“0”
C
4
“
“
CM
7
=0(8 MHz selected)
CM
6
=1(Middle-speed)
CM
5
=0(8 MHz oscillating)
CM
4
=0(32 kHz stopped)
Middle-speed mode (f(
φ
) =1 MHz)
CM
7
=0(8 MHz selected)
CM
6
=1(Middle-speed)
CM
5
=0(8 MHz oscillating)
CM
4
=1(32 kHz oscillating)
Middle-speed mode (f(
φ
) =1 MHz)
CM
7
=0(8 MHz selected)
CM
6
=0(High-speed)
CM
5
=0(8 MHz oscillating)
CM
4
=0(32 kHz stopped)
High-speed mode (f(
φ
) =4 MHz)
CM
7
=0(8 MHz selected)
CM
6
=0(High-speed)
CM
5
=0(8 MHz oscillating)
CM
4
=1(32 kHz oscillating)
High-speed mode (f(
φ
) =4 MHz)
CM
7
=1(32 kHz selected)
CM
6
=1(Middle-speed)
CM
5
=0(8 MHz oscillating)
CM
4
=1(32 kHz oscillating)
Low-speed mode (f(
φ
) =16 kHz)
CM
7
=1(32 kHz selected)
CM
6
=0(High-speed)
CM
5
=0(8 MHz oscillating)
CM
4
=1(32 kHz oscillating)
Low-speed mode (f(
φ
) =16 kHz)
Low-power dissipation
mode (f(
φ
) =16 kHz)
CM
7
=1(32 kHz selected)
CM
6
=1(Middle-speed)
CM
5
=1(8 MHz stopped)
CM
4
=1(32 kHz oscillating)
CM
6
“1”
“0”
CM
6
“1”
“0”
CM
6
“1”
“0”
C
4
“
“
C
7
“
“
C
7
“
“
C
5
“
“
C
5
“
“
CM
4
“1
CM
6
“1
“0
“0
CM
4
CM
6
“0
“1
“1
“0
CM
5
“1
CM
6
“1
“0
“0
CM
5
CM
6
“0
“1
“1
“0
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