參數(shù)資料
型號(hào): HMS91C7134
英文描述: [Monitor]
中文描述: [顯示器]
文件頁(yè)數(shù): 30/86頁(yè)
文件大小: 1508K
代理商: HMS91C7134
HMS91C7134
30
November.2001 ver1.0
10. POWER-SAVING MODE
Two software selectable modes of reduced power consumption are implemented.
Idle mode
Power-down mode
The following functions are switched off when the microcontroller enters the Idle mode.
CPU (halted)
I2C interface (halted)
PWM0 to PWM7 and DPWM0 to DPWM2 (reset, output = High)
8-bit ADC (aborted if conversion in progress)
The following functions remain active during Idle mode.
These functions may generate an interrupt or reset and thus terminate the Idle mode.
Timer0, Timer1 and Timer2
Watchdog timer
DDC interface
External interrupt
Mode detection
In Power-down mode, the system clock is halted. Both the oscillator will be stopped after setting the bit PD in PCON.
10.1 Power control register
The modes Idle and Power-down are activated by software via the PCON register.
Table 10-1 Power control Register(PCON:87H) RESET VALUE:xx000000B
Table 10-2 Description of the PCON bits
7
6
5
4
3
2
2
0
-
-
LVREN
LVRLS
GF1
GF0
PD
IDL
BIT
7 to 6
SYMBOL
-
FUNCTION
Not used
Enable low voltage reset
Select low VDD level ; 3.7V or 3.5V
General purpose flag bit
General purpose flag bit
Activate Power-down mode
Activate Idle mode
5
LVREN
4
LVRLS
3
GF1
2
GF0
1
PD
0
IDL
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