M30622 Mitsubishi, M30622 Datasheet - Page 43

• Manufacturer Part Number: M30622
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

Clock Generating Circuit
Figure 1.13.4. Clock control registers 0 and 1
Figure 1.13.4 shows the system clock control registers 0 and 1.
b7
b7
System clock control register 0 (Note 1)
System clock control register 1 (Note 1)
Tentative Specifications REV.A
Note 1: Set bit 0 of the protect register (address 000A
Note 2: Changes to “1” when shiffing to stop mode.
Note 3: When entering power saving mode, main clock stops using this bit. When returning from stop
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
Note 6: Set port Xc select bit (CM04) to “1” before writing to this bit. The both bits can not be written at
Note 1: Set bit 0 of the protect register (address 000A
Note 2: Changes to “1” when shiffing to stop mode.
Note 3: Can be selected when bit 6 of the system clock control register 0 (address 0006
Note 4: If this bit is set to “1”, X
b6
b6
S
pecifications in this manual are tentative and subject to change.
b5
b5
mode and operating with X
itself, set system clock select bit (CM07) to “1” before setting this bit to “1”.
up to X
the same time.
If “1”, division mode is fixed at 8.
b4
b4
0
b3
b3
0
b2
b2
0
OUT
b1
b1
0
(“H”) via the feedback resistor.
b0
b0
Bit symbol
Bit symbol
Reserved bit
Reserved bit
Reserved bit
Reserved bit
CM01
CM02
CM03
CM04
CM05
CM06
CM07
CM10
CM15
CM16
CM17
CM00
Symbol
CM0
Symbol
CM1
OUT
OUT
IN
turns “H”. The built-in feedback resistor remains ON, so X
turns “H”, and the built-in feedback resistor turns null.
, set this bit to “0”. When main clock oscillation is operating by
Port X
Main clock division select
bit 0 (Note 2)
Main clock division
select bit 1 (Note 3)
Clock output function
select bit
WAIT peripheral function
clock stop bit
X
select bit (Note 2)
Main clock (X
stop bit (Note 4) (Note 5)
System clock select bit
(Note 6)
All clock stop control bit
(Note4)
X
select bit (Note 2)
IN
CIN
-X
-X
OUT
C
COUT
select bit
Bit name
Bit name
drive capacity
drive capacity
Address
Address
IN
0006
0007
-X
16
16
OUT
43
) to “1” before writing to this register.
16
16
) to “1” before writing to this register.
)
When reset
When reset
0 : LOW
1 : HIGH
0 0 : I/O port P5
0 1 : f
1 0 : f
1 1 : f
0 : Do not stop f
1 : Stop f
0 : I/O port
1 : X
0 : On
1 : Off
0 : CM16 and CM17 valid
1 : Division by 8 mode
b7 b6
b1 b0
0 : X
1 : X
0 : Clock on
1 : All clocks off (stop mode)
0 0 : No division mode
0 1 : Division by 2 mode
1 0 : Division by 4 mode
1 1 : Division by 16 mode
Always set to
Always set to
Always set to
Always set to
0 : LOW
1 : HIGH
48
20
CIN
IN
CIN
16
C
8
32
16
, X
output
output
-X
, X
output
1
OUT
COUT
, f
COUT
8
, f
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Function
32
Function
“0”
“0”
“0”
“0”
generation
1
7
, f
in wait mode
8
, f
32
in wait mode
16
) is “0”.
Mitsubishi microcomputers
IN
turns pulled
M16C / 62T Group
R
R
W
W