参数资料
型号: ST7PLU09MAE
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO8
封装: 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8
文件页数: 66/124页
文件大小: 1995K
代理商: ST7PLU09MAE
Power saving modes
ST7LUS5, ST7LU05, ST7LU09
Figure 18.
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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