MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 396

• Manufacturer Part Number: MCBSTM32EXL
• Description: BOARD EVALUATION FOR STM32F103ZE
• Manufacturer: Keil

Specifications of MCBSTM32EXL

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Real-time clock (RTC)
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Bits 15:0 RTC_CNT[31:16]: RTC counter high
Bits 15:0 RTC_CNT[15:0]: RTC counter low
RTC counter register (RTC_CNTH / RTC_CNTL)
The RTC core has one 32-bit programmable counter, accessed through two 16-bit registers;
the count rate is based on the TR_CLK time reference, generated by the prescaler.
RTC_CNT registers keep the counting value of this counter. They are write-protected by bit
RTOFF in the RTC_CR register, and a write operation is allowed if the RTOFF value is ‘1’. A
write operation on the upper (RTC_CNTH) or lower (RTC_CNTL) registers directly loads the
corresponding programmable counter and reloads the RTC Prescaler. When reading, the
current value in the counter (system date) is returned.
RTC counter register high (RTC_CNTH)
Address offset: 0x18
Reset value: 0x0000
RTC counter register low (RTC_CNTL)
Address offset: 0x1C
Reset value: 0x0000
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Reading the RTC_CNTH register, the current value of the high part of the RTC Counter
register is returned. To write to this register it is necessary to enter configuration mode (see
Section 16.3.4: Configuring RTC registers on page
Reading the RTC_CNTL register, the current value of the lower part of the RTC Counter
register is returned. To write to this register it is necessary to enter configuration mode (see
Section 16.3.4: Configuring RTC registers on page
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Doc ID 13902 Rev 9
RTC_CNT[31:16]
RTC_CNT[15:0]
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390).
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390).
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RM0008
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