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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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STR720 数据表(PDF) 156 Page - STMicroelectronics |
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STR720 数据表(HTML) 156 Page - STMicroelectronics |
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156 / 401 page  STR720 - REAL TIME CLOCK (RTC) 156/401 RTCA: RTC Alarm registers When the programmable counter RTCCNT reaches the 48 bit value stored into RTCA registers an alarm is triggered and the interrupt request RTC_alarmIT is generated. This register is write protected by bit RTOFF of RTCCR register, write operation is allowed if RTOFF value is ‘1’. RTCA_L Address Offset: 10h Reset value: FFFFh Bit 15:0 = RTCA[15:0]: RTC Alarm Low Reading RTCA_L register, the lower part of alarm time is returned. To write this register it is required to enter into configuration mode (see RTOFF bit of RTCCR register). RTCA_M Address Offset: 14h Reset value: FFFFh Bit 15:0 = RTCA[31:16]: RTC Alarm Middle Reading RTCA_M register, the middle part of alarm time is returned. To write this register it is required to enter into configuration mode (see RTOFF bit of RTCCR register). RTCA_H Address Offset: 18h Reset value: FFFFh 15 14 13 12 11 10 9 8 765432 1 0 RTCA[15:0] rw 15 14 13 12 11 10 9 8 765432 1 0 RTCA[31:16] rw 15 14 13 12 11 10 9 8 765432 1 0 RTCA[47:32] rw 1 |
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