ST92F120JR9T datasheet(105/320 Pages) STMICROELECTRONICS

部件名	ST92F120JR9T

功能描述	8/16-BIT FLASH MCU FAMILY WITH RAM, EEPROM AND J1850 BLPD

PDF	320 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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ST92F120 - RESET AND CLOCK CONTROL UNIT (RCCU)

Figure 49. Example of Low Power mode programming in WFI using CLOCK2/16

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*

ST92F120JR9T 数据表(PDF) 105 Page - STMicroelectronics

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