Ultra Start 23xx User Manual download pdf (Page 43)

AN3371 Revision history

Doc ID 018624 Rev 5 43/45

5 Revision history

Table 18. Document revision history

Date Revision Changes

20-May-2011 1 Initial release

24-Nov-2011 2

Updated Chapter 1: Overview of the STM32 advanced RTC

Updated Figure 1: RTC calendar fields on page 6

Updated Figure 2: Example of calendar display on an LCD on page 7

Updated Figure 5: Prescalers from RTC clock source to calendar unit

on page 9

Updated Figure 6: Alarm A fields on page 10

Added Section 1.2.2: Alarm sub-second configuration on page 12

Updated Figure 9: Prescalers connected to the wakeup unit for

configurations 2 and 3 on page 16

Updated Table 9: Timebase/wakeup unit period resolution with clock

configuration 2 on page 16

Updated Section 1.4.1: RTC coarse calibration on page 17

Added Section 1.4.2: RTC smooth calibration on page 18

Added Section 1.5: Synchronizing the RTC on page 19

Updated Figure 14: Time-stamp event procedure on page 21

Added Section 1.8: RTC tamper detection function on page 22

Added Section 1.11.1: RTC_CALIB output on page 26

Updated Figure 18: RTC_CALIB clock sources on page 27

Added Figure 19: Alarm flag routed to RTC_ALARM output on

page 28

Updated Section 1.12.3: RTC clock synchronization on page 30

Added Section 2: Advanced RTC features on page 31

Added STM32F4xx information to Section 3: RTC firmware driver

API on page 33

Updated Table 17: Example descriptions on page 41

17-Feb-2012 3

Added Ultra Low Power High-density information to the Introduction

Changed all ‘ULPM density devices’ to ‘ULPM and ULPH density

devices’.

Added a ULPH density column to Table 15: Advanced RTC features

and to Table 16: RTC function groups.

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Ultra Start 23xx User Manual Page 43