Nations Technologies Inc.
Tel
:
+86-755-86309900
:
Address: Nations Tower, #109 Baoshen Road, Hi-tech Park North.
Nanshan District, Shenzhen, 518057, P.R.China
316
/
631
Main function
Describe
Tamper interrupt/event
Backup registers
20 independent backup registers
Function description
RTC block diagram
Figure 14-1 RTC Block Diagram
LSI
LSE
RTC_OUT
Synchronous
15 Bits prescaler
BCD
Calendar
Asynchronous
7 Bits prescaler
RTCCLK
RTC_SUBS
ck_apre
Default value
256Hz
ck_spre
Default value
1Hz
RTC_TAMP2
RTC_TAMP1
Timestamp
register
TAM2F
TISF
Prescale
2
、
4
、
8
、
16
WKUPSEL[2:0]
16 bits wakeup
automatic reload timer
RTC_WKUPT
Output
Control
HSE/32
WTF
Alarm A
Alarm B
=
=
ALAF
ALBF
OUTSEL[1:0]
RTC_CALIB
RTC_ALARMx
EXTI0
EXTI1
EXTI15
RTC_TAMP3
...
Tamper Detection
TAM1F
TAM3F
RTC_BKP(1~20)
Erase
Prescaler
256
、
512
、
1024
、
2048
、
4096
、
8192
、
16384
、
32768
TPFREQ[2:0]
Tamper Detection
Tamper Detection
Calibration
20bits counter
Shadow register
RTC_TSH
RTC_DATE
RTC includes the following modules:
Alarm A and Alarm B event/interrupts
Timestamp event/interrupt
Tamper event/interrupt
20 32-bit backup registers