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ST7FOXF1 датащи(PDF) 63 Page - STMicroelectronics

номер детали ST7FOXF1
подробное описание детали  8-bit MCU with single voltage Flash memory, SPI, I²C, ADC, timers
PDF  226 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7FOXF1 датащи(HTML) 63 Page - STMicroelectronics

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ST7FOXF1, ST7FOXK1, ST7FOXK2
Power saving modes
63/226
Figure 24.
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
N
Y
CPU
OSCILLATOR
PERIPHERALS
IBIT
ON
ON
0
OFF
FETCH RESET VECTOR
OR SERVICE INTERRUPT
CPU
OSCILLATOR
PERIPHERALS
IBIT
ON
OFF
0
ON
CPU
OSCILLATOR
PERIPHERALS
IBIT
ON
ON
X 1)
ON
256 CPU CLOCK CYCLE
DELAY
Table 20.
Enabling/disabling active-halt and halt modes
LTCSR TBIE
bit
ATCSR OVFIE
bit
ATCSRCK1 bit ATCSRCK0 bit
Meaning
0x
x0
Active-Halt mode disabled
00
x
x
0111
1
xxx
Active-Halt mode enabled
x
101



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