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參數(shù)資料
| 型號： | M30201 |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單片16位CMOS微機 |
| 文件頁數(shù)： | 21/159頁 |
| 文件大小： | 2319K |
| 代理商： | M30201 |
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Clock Generating Circuit
Unde
deeopmen
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
21
Figure 1.18 shows the system clock control registers 0 and 1.
Figure 1.18. Clock control registers 0 and 1
System clock control register 0 (Note 1)
Symbol
CM0
Address
0006
16
When reset
48
16
Bit name
Function
Bit symbol
b7
b6
b5
b4 b3
b2
b1
b0
0 0 : I/O port P5
4
0 1 : f
C
output
1 0 : f
8
output
1 1 : Clock divide counter output
0 : Do not stop peripheral function clock in wait mode
1 : Stop peripheral function clock in wait mode (Note 8)
b1 b0
CM07
CM05
CM04
CM03
CM01
CM02
CM00
CM06
Clock output function
select bit
WAIT peripheral function
clock stop bit
X
CIN
-X
COUT
drive capacity
select bit (Note 2)
0 : LOW
1 : HIGH
Port X
C
select bit
0 : I/O port
1 : X
CIN
-X
COUT
generation
0 : On
1 : Off
0 : CM16 and CM17 valid
1 : Division by 8 mode
Main clock (X
IN
-X
OUT
)
stop bit (Note 3,4,5)
Main clock division select
bit 0 (Note 7)
System clock select bit
(Note 6)
0 : X
IN
, X
OUT
1 : X
CIN
, X
COUT
Note 1: Set bit 0 of the protect register (address 000A
16
) to “1” before writing to this register.
Note 2: Changes to “1” when shifting to stop mode and at a reset.
Note 3: This bit is used to stop the main clock when placing the device in a low-power mode. If you want to operate with X
IN
after exiting from the stop mode, set this bit to “0”. When operating with a self-excited oscillator, set the system clock
select bit (CM07) to “1” before setting this bit to “1”.
Note 4: When inputting external clock, only clock oscillation buffer is stopped and clock input is acceptable.
Note 5: If this bit is set to “1”, X
OUT
turns “H”. The built-in feedback resistor remains being connected, so X
IN
turns pulled up to
X
OUT
(“H”) via the feedback resistor.
Note 6: Set port Xc select bit (CM04) to “1” and stabilize the sub-clock oscillating before setting to this bit from “0” to “1”.
Do not write to both bits at the same time. And also, set the main clock stop bit (CM05) to “0” and stabilize the main clock
oscillating before setting this bit from “1” to “0”.
Note 7: This bit changes to “1” when shifting from high-speed/medium-speed mode to stop mode and at a reset. When shifting
from low-speed/low power dissipation mode to stop mode, the value before stop mode is retained.
Note 8: f
C32
is not included.
System clock control register 1 (Note 1)
Symbol
CM1
Address
0007
16
When reset
20
16
Bit name
Function
Bit symbol
b7
b6
b5
b4 b3
0
b2
0
b1
0
b0
CM10
All clock stop control bit
(Note 4)
0 : Clock on
1 : All clocks off (stop mode)
CM15
X
IN
-X
OUT
drive capacity
select bit (Note 2)
0 : LOW
1 : HIGH
W
A
R
W
R
CM16
CM17
Reserved bit
Always set to
“0”
Reserved bit
Always set to
“0”
Main clock division
select bit 1 (Note 3)
0 1 : Division by 2 mode
1 0 : Division by 4 mode
1 1 : Division by 16 mode
b7 b6
Reserved bit
Always set to
“0”
Reserved bit
Always set to
“0”
0
A
AA
A
A
A
A
A
A
A
A
A
A
A
A
A
A
AA
AA
AA
AA
AA
AA
AA
Note 1: Set bit 0 of the protect register (address 000A
16
) to “1” before writing to this register.
Note 2: This bit changes to “1” when shifting from high-speed/medium-speed mode to stop mode and at a reset. When shifting
from low-speed/low power dissipation mode to stop mode, the value before stop mode is retained.
Note 3: Can be selected when bit 6 of the system clock control register 0 (address 000616) is “0”. If “1”, division mode is fixed at 8.
Note 4: If this bit is set to “1”, X
OUT
turns “H”, and the built-in feedback resistor is cut off. X
CIN
and X
COUT
turn high-impedance state.
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| M30201E6-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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