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AN2629 Datasheet(PDF) 38 Page - STMicroelectronics |
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AN2629 Datasheet(HTML) 38 Page - STMicroelectronics |
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38 / 43 page  Using the Stop and Standby mode in battery-operated applications AN2629 38/43 Doc ID 13922 Rev 2 Hardware environment Use this example with STM32F10xxx evaluation board: refer to the user manual UM0426: “STM3210B-EVAL evaluation board” to use the STM3210B-EVAL. After connecting the power supply and JTAG tools, the power consumption can be measured by replacing Jumper JP9 by an ammeter. Firmware description ● Launch this example with the used toolchain: The standard tools can be used to run the example. The .uv2 file used to launch the project with the RVMDK toolchain is contained in the RVMDK folder. The .eww file, used to launch the project with the EWARM toolchain, is in the EWARM folder. ● Configure the firmware At the beginning of the main.c, two #define can be selected to parameterize the example: –2 #define select the timing of the loop: #define LOOP_20ms #define LOOP_200ms – For the example to run, it is necessary to keep one #define of each type. – After compiling the example, the STM32F10xxx Flash memory can be downloaded. Caution: To reload the Flash memory after launching the low-power example, the boot pin configuration must be changed from BOOT FLASH to BOOT RAM, and the reset button must be pressed. This is because the debugger cannot take the hand when the STM32F10xxx is in low-power mode. Once this has been done, the boot pin must be configured back to BOOT FLASH. Measurement is then started by disconnecting and reconnecting the power supply. The power off/ power on reset sequence is necessary to avoid internal debug module overconsumption. 7.4 Typical measurement results Table 10 shows the measurements made with these examples. Table 10. Example measurements #define mode Consumption with TA = +25 °C 20 ms 200 ms WFE 1 mA 970 µA STOP_WFE code loop running from Flash memory 58 µA 18.5 µA STOP_WFE code loop remap in RAM 34.7 µA 16.2 µA Standby 106 µA 14 µA |
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