Cmsemicon CMS80F731 Series, Reference Manual

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CMS80F731x Reference Manual
5.
Power Management
Low-power modes fall into 2 categories:
◆ IDLE: Idle mode
◆ STOP: Sleep mode
When users use C language for program development, it is strongly recommended to use IDLE and STOP macros to control
the system mode, and do not directly set THE IDLE and STOP bits. The macros are as follows:
Enter idle mode: IDLE();
Enter sleep mode: STOP();
5.1 Power Management Register PCON
0x87 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
PCON SMOD0 SMOD1 -- -- -- THEIR STOP IDLE
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Reset value 0 0 0 0 0 0 0 0
Bit7
SMOD0: UART0 baud rate multiplier;
0=
UART0 baud rate is normal;
1=
The UART0 baud rate doubles.
Bit6
SMOD1: UART1 baud rate multiplier;
0=
UART1 baud rate is normal;
1=
The UART1 baud rate is doubled.
Bit5~Bit3
-- Reserved, all must be 0.
Bit2 THEIR: STOP status function wake-up enable bit;
(The system can be restarted by a power-down reset or an enabled external reset
regardless of the SWE value)
0=
Disables functional wake-up;
1=
Enables function wake-up (wake-up by external interrupts and timed wake-ups).
Bit1 STOP: Sleep state control bit;
0=
Not in hibernation;
1=
Enters a hibernate state (exits STOP mode to automatically clear zero).
Bit0 IDLE: Idle state control bit;
0=
Not in the idle state;
1=
Enter the idle state (exit IDLE mode to clear automatically).