st92f124 STMicroelectronics, st92f124 Datasheet - Page 132
st92f124
Manufacturer Part Number
st92f124
Description
8/16-bit Single Voltage Flash Mcu Family With Ram, E3 Tmemulated Eeprom, Can 2.0b And J1850 Blpd
Manufacturer
STMicroelectronics
Datasheet
1.ST92F124.pdf
(426 pages)
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ST92F124/F150/F250 - RESET AND CLOCK CONTROL UNIT (RCCU)
Figure 64. Example of Low Power mode programming in WFI using CLOCK2/16
132/426
9
Interrupt
CSU_CKSEL
Interrupt Routine
CSU_CKSEL
PROGRAM FLOW
User’s Program
User’s Program
WFI instruction
LPOWFI
MX[1:0]
DX[2:0]
WFI status
Begin
WAIT
WAIT
000
1
01
1
1
CLOCK2/16 selected and PLL
PLL is system clock source
PLL is system clock source
Low Power Mode enabled
No code is executed until
to 1, and PLL turned ON
an interrupt is requested
Wait for the PLL to lock
Execution of user program
Wait for the PLL to lock
stopped
resumes at full speed
PLL multiply factor
Wait For Interrupt
Divider factor set
CLOCK2 selected
Interrupt serviced
PLL switched on
in WFI state
Reset State
set to 6
activated
automatically
* T
1
= PLL lock-in time
F
Xtal
T
INTCLK FREQUENCY
T
1
1
= 4 MHz
*
*
125 KHz
12 MHz
2 MHz
12 MHz
2 MHz
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