m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 288

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Figure 2.16.4. Power control-related registers
System clock control register 0 (Note 1)
System clock control register 1 (Note 1)
b7
b7
b6
b6
b5
b5
b4
b4
0
b3
b3
0
page 279 of 354
b2
b2
0
b1
b1
0
0 0
b0
b0
Note 1: Set bit 0 of the protect register (address 000A
Note 2: This bit changes to “1”, when changing from high-speed/medium mode to stop mode and at
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
Note 1: Set bit 0 of the protect register (address 000A
Note 2: Changes to “1” when changing to stop mode and at a reset.
Note 3: When entering power saving mode, main clock stops using this bit. When returning from
Note 4: When inputting external clock, only clock oscillation buffer is stopped and clock input is
Note 5: If this bit is set to “1”, X
Note 6: Set port Xc select bit (CM04) to “1”, and stabilize the sub clock oscillating before setting to
Note 7: This bit changes to “1”, when changing from high-speed/medium mode to stop mode and at
Note 8: f
Note 9: When the X
CM10
CM15
CM16
CM17
Reserved bit
Bit Symbol
Bit Symbol
CM02
CM03
CM04
CM05
CM06
CM07
Reserved bit
reset. When shifting from low-speed/low power dissipation mode to stop mode, the value
before stop mode is retained.
If “1”, division mode is fixed at 8.
X
Symbol
CM0
by itself, set system clock select bit (CM07) to “1” before setting this bit to “1”.
acceptable.
so X
this bit from “0” to “1”. Do not write to both bits at the same time. Also, set the main clock
stop bit (CM05) to “0”, and stabilize the main clock oscillating before setting this bit from
“1” to “0”.
reset. When shifting from low-speed/low power dissipation mode to stop mode, the value
before stop mode is retained.
Symbol
CM1
stop mode and operating in X
C32
COUT
IN
is not included. Do not set to “1” when using low-speed or low power dissipation mode.
turn high-impedance state.
becomes pulled up to Xout (“H”) using the feedback resistor.
Main clock division select
bit 1 (Note 3)
Xin-Xout drive capacity
select bit (Note 2)
All clock stop control bit
(Note 4)
CIN
WAIT peripheral function
clock stop bit
Xcin-Xcout drive capacity
select bit (Note 2)
Port Xc select bit
Main clock (Xin-Xout)
stop bit (Note 3, 4, 5)
Main clock division select
bit 0 (Note 7)
System clock select bit
/X
COUT
Bit Name
Bit Name
is used, set ports P8
OUT
OUT
turns “H”, and the built-in feedback resistor is cut off. X
becomes “H”. The built-in feedback resistor remains connected,
IN
(Note 6)
Address
Address
0006
0007
, set this bit to “0”. When main clock oscillation is operating
16
16
6
and P8
0 : Clock on
1 : All clocks off (stop mode)
Always set to “0”
0 : LOW
1 : HIGH
b7 b6
0 0 : No division mode
0 1 : Divide-by-2 mode
1 0 : Divide-by-4 mode
1 1 : Divide-by-16 mode
0 : Do not stop in wait mode
1 : Stop in wait mode (Note 8)
0 : LOW
1 : HIGH
0 : I/O port
1 : Xcin-Xcout generation
0 : On
1 : Off
0 : CM16 and CM17 valid
1 : Divide-by-8 mode
0 : Xin, Xout
1 : Xcin, Xcout
Always set to “0”
16
16
) to “1” before writing to this register.
) to “1” before writing to this register.
7
as the input ports without pull-up.
Function
Function
When reset
When reset
48
20
16
16
16
O O
) is “0”.
R W
O O
O O
O O
O O
O O
R W
O O
O O
O O
CIN
O O
O O
O O
and
2. Power Control