AN2633 datasheet(37/48 Pages) STMICROELECTRONICS

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AN2633

Operating measurements

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3.2.6

Run mode tests

There are two tests in Normal Run mode. The first one operates in Normal Run mode with

all peripherals enabled and the other one operates with all peripherals disabled (refer to

Section 2.7: SCU_APBPeriphClockConfig and Section 2.8: SCU_AHBPeriphClockConfig

for information on configuring the peripherals).

Test 0: Run_Mode_Periph_ON:

Initially, the system operates in Normal Run mode with the oscillator as clock source

and a LED connected to P9.1 pin is switched on.

When you push a button connected to P7.4, the selected (uncommented) clock is

configured and all peripherals are enabled. To indicate that the system operates in

Normal Run mode with all peripherals enabled the LED connected to P9.1 is switched

OFF and a LED connected to P9.0 is toggled.

Test 1: Run_Mode_Periph_OFF:

Initially, the system operates in Normal Run mode with the oscillator as clock source

and a LED connected to P9.1 pin is switched on.

When you push a button connected to P7.4, the selected (uncommented) clock is

configured and all peripherals are disabled. To indicate that you operate in Normal Run

mode with all peripherals disabled, a LED connected to P9.1 is switched off.

3.2.7

Sleep mode tests

These tests show how to put the system in Sleep mode and then to wake-up from this mode

using either an RTC alarm, an external wake-up via Wake-up Unit (WIU), an external wake-

up interrupt via WIU or an external reset.

In Sleep mode, there are 4 possible configurations:

●

LVD_ON_PWD_ON: in this case the Low Voltage Detector (LVD) is enabled and the

Power Down mode is disabled.

●

LVD_ON_PWD_OFF: the LVD is enabled and the PWD is disabled.

●

LVD_OFF_PWD_ON: the LVD is disabled and the PWD is enabled.

●

LVD_OFF_PWD_OFF: the LVD is disabled and the PWD is disabled.

Test 2,3,4 and 5: LPMode_Sleep_RTCAlarm:

The system enters this mode as follows:

void LPMode_Run_Special_Interrupt_FIQ(void)

Test33

void LPMode_Vbatt_SRAM_ON(void)

Test 34

void LPMode_Vbatt_SRAM_OFF(void)

Test 35

Table 18.

Test routines

Routines

Test

Number

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