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ST92F120 bảng dữ liệu(PDF) 105 Page - STMicroelectronics

tên linh kiện ST92F120
Giải thích chi tiết về linh kiện  8/16-BIT FLASH MCU FAMILY WITH RAM, EEPROM AND J1850 BLPD
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ST92F120 bảng dữ liệu(HTML) 105 Page - STMicroelectronics

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ST92F120 - RESET AND CLOCK CONTROL UNIT (RCCU)
Figure 49. Example of Low Power mode programming in WFI using CLOCK2/16
n
User’s Program
WFI instruction
PROGRAM FLOW
INTCLK FREQUENCY
Interrupt
PLL multiply factor
Divider factor set
Wait for the PLL to lock
Wait For Interrupt
No code is executed until
Interrupt serviced
set to 6
to 1, and PLL turned ON
an interrupt is requested
Low Power Mode enabled
2 MHz
12 MHz
2MHz
12 MHz
*TPLK = PLL lock-in time
TPLK*
FXtal = 4 MHz, VDD = 2.7 V min
WAIT
CSU_CKSEL
← 1
PLL is system clock source
PLL switched on
125 KHz
in WFI state
User’s Program
activated
PLL is system clock source
Wait for the PLL to lock
WAIT
LPOWFI
← 1
WFI status
Interrupt Routine
CSU_CKSEL
← 1
DX2-0
← 000
MX(1:0)
← 01
Reset State
CLOCK2/16 selected and PLL
automatically
Begin
CLOCK2 selected
stopped
Execution of user program
resumes at full speed
TPLK*
9



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