STMicroelectronics Multiple-device temperature sensor and RTC demonstration board based on the STM32 STEVAL-IFS017V1 STEVAL-IFS017V1 Data Sheet
Product codes
STEVAL-IFS017V1
UM1539
Getting started
Doc ID 023106 Rev 1
29/46
1.2.33 M41T83_QFN
RTC
analog calibration configuration
1.
Check the FT bit checkbox.
2.
The slider for analog calibration gets enabled and LED D6 glows on the motherboard.
This disables the remaining RTC window.
This disables the remaining RTC window.
3.
Enter the calibration value using the slider and press the Write button to configure the
value inside the RTC registers.
value inside the RTC registers.
4.
After the value is configured, remove the check from the FT bit checkbox and then the
remaining GUI window gets enabled.
remaining GUI window gets enabled.
1.2.34 M41T83_QFN
RTC
HT bit configuration
At every power-down the HT bit is set. To start the display of the clock on consecutive
powering, the HT bit should be reset each time.
powering, the HT bit should be reset each time.
1.
The HT bit set and reset option is selected from the dropdown menu.
2.
Setting the HT bit halts the clock display of RTC.
3.
Resetting the HT bit resumes the clock display of RTC.
1.2.35 M41T83_QFN
RTC
FT bit configuration
The FT bit is a checkbox; if none of the RTC interrupt functions (Alarm/WDG/SQW) are
selected then checking this box selects the frequency test function of RTC and it is
displayed as a glow on the D3 LED. Resetting the bit switches off the frequency test
function. Checking of the FT bit disables the GUI window except for the analog calibration
section.
selected then checking this box selects the frequency test function of RTC and it is
displayed as a glow on the D3 LED. Resetting the bit switches off the frequency test
function. Checking of the FT bit disables the GUI window except for the analog calibration
section.
1.2.36
M41T83_QFN RTC square wave configuration
M41T83_QFN RTC has a square wave output option.
1.
Select the square wave output frequency from the output frequency dropdown menu.
2.
Check the enable square wave output checkbox to enable the square wave function.
3.
D5 LED blinks on the motherboard to show the status of the square wave output of
RTC.
RTC.
1.2.37
GUI window for M41T83SMY6E(SOX18 package) RTC
M41T83SMY6E RTC is an SOX18 package and is mounted on a separate daughter card.
This RTC has one silicon crystal and therefore needs no external crystal for operation.
This RTC has one silicon crystal and therefore needs no external crystal for operation.
Below are the steps for selecting the M41T83_MX RTC:
1.
Plug in the M41T83(SOX18 package) RTC daughter card on the motherboard (take
note of the notch on the daughter card connector for mounting).
note of the notch on the daughter card connector for mounting).
2.
Power up the motherboard using USB cable.
3.
Open the GUI and select the RTC selection icon, as shown in
4.
Select M41T83(SOX18) RTC from the menu and press OK.
5.
M41T83 (SOX18) RTC window opens, as shown in
6.
On powering up the board, the RTC clock is seen as halted showing the time at which
the power was put down. The clock starts running only after resetting the HT bit in the
RTC GUI window.
the power was put down. The clock starts running only after resetting the HT bit in the
RTC GUI window.