參數(shù)資料
型號: ST7FLU05MAE
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO8
封裝: 0.150 INCH, LEAD FREE, PLASTIC, SOP-8
文件頁數(shù): 67/124頁
文件大小: 2186K
代理商: ST7FLU05MAE
Obsolete
Product(s)
- Obsolete
Product(s)
ST7LUS5, ST7LU05, ST7LU09
Power saving modes
47/124
Figure 19.
Wait mode flowchart
1.
Before servicing an interrupt, the CC register is pushed on the stack. The I bit of the CC register is set
during the interrupt routine and cleared when the CC register is popped.
8.4
Active halt and halt modes
Active halt and halt modes are the two lowest power consumption modes of the MCU. They
are both entered by executing the HALT instruction. The decision to enter either in active
halt or halt mode is given by the LTCSR/ATCSR register status as shown in the following
table:
WFI instruction
Reset
Interrupt
Y
N
Y
CPU
Oscillator
Peripherals
Ibit
On
0
Off
Fetch reset vector
or service interrupt
CPU
Oscillator
Peripherals
Ibit
On
Off
0
On
CPU
Oscillator
Peripherals
Ibit
On
X (1)
On
64 CPU clock cycle
delay
Table 21.
LTC/ATC low power mode selection
LTCSR TBIE bit
ATCSR OVFIE bit
ATCSRCK1 bit
ATCSRCK0 bit
Meaning
0x
x0
Active halt mode
disabled
00
x
01
11
1x
x
Active halt mode
enabled
x1
0
1
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