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| 型號： | 38B5 |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機 |
| 文件頁數(shù)： | 60/70頁 |
| 文件大?。?/td> | 864K |
| 代理商： | 38B5 |
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MITSUBISHI MICROCOMPUTERS
38B5 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
59
PRELIMINARY
Notice: This s not a final specification.
Some parametric imits are subject to change.
Fig. 71 State Transitions of System 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
) (High-speed mode)
1: f(X
IN
)/4 (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)
Reset
C
4
C
7
C
4
C
5
CM
6
CM
6
“1”
CPU mode register
(CPUM : address 003B
16
)
b7
b4
C
7
C
5
CM
6
CM
6
“0”
“
“
“
“
“
“
“
“
“
“
“
“
“0”
“1”
“0”
“1”
“0”
“1”
CM
4
“1
“0
“0
CM
6
CM
4
“1
“0
“1
“0
CM
5
“1
“0
“0
CM
6
“1
CM
5
“1
“0
“1
“0
“1
CM
6
CM
6
CM
7
=0(4 MHz selected)
CM
6
=1(middle-speed)
CM
5
=0(X
IN
oscillating)
CM
4
=0(32 kHz stopped)
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 return to the source mode when the stop mode or the wait
mode is ended.
3:
Timer operates in the wait mode.
4:
When the stop mode is ended, a delay of approximately 1 ms occurs by Timer 1 in middle-/high-speed mode.
5:
When the stop mode is ended, a delay of approximately 0.25 s occurs by Timer 1 in low-speed mode.
6:
The example assumes that 4 MHz is being applied to the X
IN
pin and 32 kHz to the X
CIN
pin.
φ
indicates the internal system clock.
Middle-speed mode
(
=1 MHz)
Middle-speed mode
(
=1 MHz)
CM
7
=0(4 MHz selected)
CM
6
=1(middle-speed)
CM
5
=0(X
IN
oscillating)
CM
4
=1(32 kHz oscillating)
CM
7
=0(4 MHz selected)
CM
6
=0(high-speed)
CM
5
=0(X
IN
oscillating)
CM
4
=0(32 kHz stopped)
High-speed mode
(
=4 MHz)
CM
7
=0(4 MHz selected)
CM
6
=0(high-speed)
CM
5
=0(X
IN
oscillating)
CM
4
=1(32 kHz oscillating)
High-speed mode
(
=4 MHz)
CM
7
=1(32 kHz selected)
CM
6
=0(high-speed)
CM
5
=0(X
IN
oscillating)
CM
4
=1(32 kHz oscillating)
Low-speed mode
(
=16 kHz)
CM
7
=1(32 kHz selected)
CM
6
=0(high-speed)
CM
5
=1(X
IN
stopped)
CM
4
=1(32 kHz oscillating)
CM
7
=1(32 kHz selected)
CM
6
=1(middle-speed)
CM
5
=0(X
IN
oscillating)
CM
4
=1(32 kHz oscillating)
Low-speed mode
(
=16 kHz)
CM
7
=1(32 kHz selected)
CM
6
=1(middle-speed)
CM
5
=1(X
IN
stopped)
CM
4
=1(32
kHz oscillating)
Low-power dissipation mode
( =16 kHz)
Low-power dissipation mode
( =16 kHz)
Notes
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| 38B5_M | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES |
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| 38B7_M | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES |
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