M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 459

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

444
Power Control
Operation
Figure 2.14.6. Example of wait mode set-up
2.14.3 Wait Mode Set-Up
Settings and operation for entering wait mode are described here.
(2) Interrupt enable flag (I flag)
(3) Canceling protect
(1) Setting interrupt to cancel wait mode
b7
b7
(3) Control of CPU clock
(4) WAIT instruction
b7
Note: When switching the system clock, it is necessary
(1) Enables the interrupt used for returning from wait mode.
(2) Sets the interrupt enable flag (I flag) to “1”.
(3) Clears the protection and changes the content of the system clock control register.
(4) Executes the WAIT instruction.
to wait for the oscillation to stabilize.
0 0 0 0
Interrupt control register
TBiIC(i=3 to 5)
BCNIC
KUPIC
SiTIC(i=0 to 2)
SiRIC(i=0 to 2)
TAiIC(i=0 to 4)
TBiIC(i=0 to 2)
b0
b0
1
b0
Interrupt priority level select bit
Enables writing to system clock control registers 0 and 1
(addresses 0006
Make sure that the interrupt priority
level of the interrupt which is used
to cancel the wait mode is higher
than the processor interrupt priority
(IPL) of the routine where the
WAIT instruction is executed.
Reserved bit
Main clock division select bit
1 : Write-enabled
Protect register [Address 000A
PRCR
Must be set to “0”
b7 b6
System clock control register 1
[Address 0007
0 0 : No division mode
0 1 : Division by 2 mode
1 0 : Division by 4 mode
1 1 : Division by 16 mode
[Address 0045
[Address 004A
[Address 004D
[Address 0051
[Address 0052
[Address 0055
[Address 005A
“1”
16
16
] CM1
and 0007
16
16
16
16
16
16
16
, 0053
, 0054
to 0047
]
]
to 0059
to 005C
16
)
16
16
16
]
16
, 004F
, 0050
16
16
b7
]
]
]
Wait mode
16
16
]
]
0
b7
INTiIC(i=3)
SiIC/INTjIC (i=4, 3)
INTiIC(i=0 to 2)
b0
Interrupt priority level select bit
Reserved bit
Make sure that the interrupt priority level of the
interrupt which is used to cancel the wait mode is
higher than the processor interrupt priority (IPL) of
the routine where the WAIT instruction is executed.
Must be set to “0”
(j=3, 4)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
b0
WAIT peripheral function clock stop bit
Port X
Main clock (X
Main clock division select bit 0
System clock select bit (Note)
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
0 : X
1 : X
System clock control register 0
[Address 0006
[Address 0044
[Address 0048
[Address 0048
[Address 005D
CIN
IN
CIN
C
, X
select bit
-X
, X
1
OUT
, f
COUT
COUT
8
IN
, f
-X
32
16
generation
1
OUT
] CM0
, f
in wait mode
16
16
16
16
8
, f
) stop bit
]
, 0049
, 0049
to 005F
32
in wait mode
Mitsubishi microcomputers
M16C / 62 Group
16
16
]
]
16
]