UM0139 datasheet(22/38 Pages) STMICROELECTRONICS

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Emulation Characteristics

UM0139

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Table 5 shows the Hardware Simulations that are available, depending on the target MCU

that you have chosen in the MCU Configuration window.

The simulation scenarios that you may choose in the Hardware Simulation window are:

●

LVD (Low Voltage Detector) Reset: When this simulation is chosen, a chip reset is

generated immediately, as if low voltage had been detected by the emulator. The reset

generated typically lasts 30 µs.

●

AVD (Auxiliary Voltage Detector) Interrupt + LVD Reset: When this simulation is

chosen, an interrupt occurs immediately and lasts for a configurable duration. Once the

duration of the interrupt is over, a chip reset occurs (lasting 30 µs typically), and

immediately afterwards, another interrupt of the same configured duration occurs. To

configure the duration of the two interrupts, click on the downward arrow button, and

type in the duration in µs in the Delay field.

This simulation scenario allows you to simulate a power-down of the chip (first

interrupt), followed by a reset, and a power-up of the chip (2nd interrupt). By varying the

duration of the interrupts preceding and following the chip reset, you can simulate

different rates of powering down and up.

●

Clock Filter Interrupt: This feature is available with only certain target MCUs—see

Table 5. When this simulation is chosen, an interrupt occurs immediately, of

configurable duration. Once the interrupt is over, the program continues running. To

configure the duration of the interrupts, click on the downward arrow button, and type in

the duration in

µs in the Delay field.

In the Hardware Simulation window, choose the scenario you wish to simulate on the

emulator, and enter the duration of the interrupts (if applicable). Click Send to begin the

simulation.

Table 5.

Hardware simulation functions by target MCU

Target MCU

Hardware simulations available

ST7226x

LVD Reset

AVD Interrupt + LVD Reset

Clock Filter Interrupt

ST7LITEx

ST7DALI

LVD Reset

AVD Interrupt + LVD Reset

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