ST92124V1Q-Auto STMicroelectronics, ST92124V1Q-Auto Datasheet - Page 133

• Manufacturer Part Number: ST92124V1Q-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST92124V1Q-Auto

• Internal Memory: Single Voltage FLASH up to 256 Kbytes, RAM up to 8Kbytes, 1K byte E3 TM (Emulated EEPROM)
• Minimum Instruction Time: 83 ns (24 MHz int. clock)

Figure 64. Example of Low Power mode programming in WFI using CLOCK2/16
Interrupt
CSU_CKSEL ← 1
Interrupt Routine
CSU_CKSEL ← 1
PROGRAM FLOW
User’s Program
User’s Program
WFI instruction
LPOWFI ← 1
MX[1:0] ← 01
DX[2:0] ← 000
WFI status
Begin
WAIT
WAIT
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
ST92124xxx-Auto/150xxxxx-Auto/250xxxx-Auto
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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