AN3371 datasheet(35/45 Pages) STMICROELECTRONICS

35 / 45 page

AN3371

RTC firmware driver API

Doc ID 018624 Rev 5

35/45

3.1.4

Outputs configuration

The RTC has two different outputs:

●

AFO_ALARM, used to manage the RTC alarm A, alarm B and WaKeUp signals. To

output the selected RTC signal on RTC_AF1 pin, use the

RTC_OutputConfig()

function.

●

AFO_CALIB, used to manage the RTC Clock divided by a 64 (512 Hz) signal and the

calendar clock (1 Hz). To output the RTC Clock on the RTC_AF1 pin, use the

RTC_CalibOutputCmd() function.

3.1.5

Digital calibration configuration

To configure the RTC Coarse calibration value and the corresponding sign, use the

RTC_CoarseCalibConfig() function.

To enable the RTC Coarse calibration, use the

RTC_CoarseCalibCmd() function.

To configure the RTC smooth calibration value and the calibration period, use the

RTC_SmoothCalibConfig() function.

3.1.6

TimeStamp configuration

To configure the RTC_AF1 trigger and enable the RTC TimeStamp, use the

RTC_TimeStampCmd() function.

To read the RTC TimeStamp Time and Date register, use the

RTC_GetTimeStamp()

function.

To read the RTC TimeStamp sub-second register, use the

RTC_GetTimeStampSubSecond() function.

The TAMPER1 alternate function can be mapped either to RTC_AF1(PC13) or RTC_AF2

(PI8) depending on the value of TAMP1INSEL bit in RTC_TAFCR register. You can use the

RTC_TimeStampPinSelection() function to select the corresponding pin.

3.1.7

Tamper configuration

To configure the RTC Tamper trigger, use the

RTC_TamperConfig() function.

To configure the RTC Tamper filter, use the

RTC_TamperFilterConfig() function.

To configure the RTC Tamper sampling frequency, use the

RTC_TamperSamplingFreqConfig() function.

To configure the RTC Tamper pins input precharge duration, use the

RTC_TamperPinsPrechargeDuration() function.

To enable the precharge of the Tamper pin, use the

RTC_TamperPullUpCmd() function.

To enable the TimeStamp on Tamper detection event, use the

RTC_TimeStampOnTamperDetectionCmd() function.

To enable the RTC Tamper, use the

RTC_TamperCmd() function.

The TIMESTAMP alternate function can be mapped to either RTC_AF1 or RTC_AF2

depending on the value of the TSINSEL bit in the RTC_TAFCR register. You can use the

RTC_TamperPinSelection() function to select the corresponding pin.

AN3371 Datasheet(PDF) 35 Page - STMicroelectronics

AN3371 Datasheet(HTML) 35 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

Datasheet Download

Link URL