參數(shù)資料
型號： M30100
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述： 單片16位CMOS微機(jī)
文件頁數(shù)： 23/164頁
文件大小： 3302K
代理商： M30100
deveopment
Clock Generating Circuit
Tentative Specifications REV.E1
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30100/M30102 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
22
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
0
b0
0
CM07
CM05
CM04
CM03
CM02
CM06
Reserved bit
WAIT peripheral function
clock stop bit
X
CIN
-X
COUT
drive capacity
select bit (Note 2)
0 : Do not stop peripheral function clock in wait mode
1 : Stop peripheral function clock in wait mode (Note 8)
0 : LOW
1 : HIGH
Port X
C
select bit
0 : I/O port
1 : X
CIN
-X
COUT
generation
0 : On
1 : Off
Main clock (X
IN
-X
OUT
)
stop bit (Note 3,4,5)
Main clock division select
bit 0 (Note 7)
0 : CM16 and CM17 valid
1 : Division by 8 mode
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.
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 ON, so X
IN
turns pulled up to
X
OUT
(“H”) via the feedback resistor.
Note 6: Set port Xc select bit (CM04) to “1” before setting this bit to “1”. Can not write to both bits at the same time.
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: fc
32
is not included. Do not set to “1” when using low-speed, low power dissipation or ring oscillator mode.
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
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
R
W
R
CM16
CM17
Reserved bit
Always set to
“0”
Ring oscillation stop bit
0 : Oscillation enabled
1 : Oscillation stopped (Note 5)
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
0 : Ceramic oscillation or crystal oscillation
1 : RC oscillation
X
IN
oscillation select bit
Always set to
“0”
AA
AA
AA
AA
AA
AA
AA
AA
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/middle-speed mode to stop mode or at 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 0006
16
) 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 ineffective. The mode of power control cannot
be shifted to the stop mode directly from the oscillator mode.
Note 5: This bit can be set to “1” only when both the main clock switch bit (CM22) and clock monitor bit (CM23) are set to “0” .
Moreover, this bit is automatically set to “0” if the main clock switch bit (CM22) is set to “1”.
Always set to
“0”
CM13
CM14
Figure 1.8.4. System clock control registers 0 and 1
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