M41TC8025 datasheet(21/41 Pages) STMICROELECTRONICS

部件名	M41TC8025

功能描述	Highly accurate, temperature-compensated serial real-time clock (RTC) with embedded crystal

PDF	41 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

21 / 41 page

DocID022873 Rev 4

21/41

M41TC8025

Operation

2.6.4

Starting the fixed-cycle timer interrupt

The fixed-cycle timer interrupt internal counter value starts at the rising edge of the SCL

signal that occurs when the TE value is changed from "0" to "1" (after the LSB is

transferred). Refer to Figure 11 for a detailed illustration.

Figure 11. Fixed-cycle timer interrupt starting point

2.6.5

Stopping the fixed-cycle timer interrupt

When the RESET bit in control register 0Fh is 1, the clock divider <4 KHz is stopped. As a

result, the fixed-cycle timer interrupt with source clocks of 64 Hz, 1 Hz and "minute" update

will be stopped. The RESET bit will not affect the fixed-cycle timer interrupt with the source

clock of 4,096 Hz.

2.6.6

Example operation of the fixed-cycle timer interrupt

The fixed-cycle timer interrupt example is given in Figure 12. The fixed-cycle timer interrupt

timing sequence is given in Figure 13.

Figure 12. Example of fixed-cycle timer interrupt

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M41TC8025 数据表(PDF) 21 Page - STMicroelectronics