参数资料
型号: M41T93RMY6E
厂商: STMICROELECTRONICS
元件分类: 时钟/数据恢复及定时提取
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDSO18
封装: 0.300 INCH, ROHS COMPLIANT, PLASTIC, SOP-18
文件页数: 20/49页
文件大小: 719K
代理商: M41T93RMY6E
M41T93
Clock operation
Doc ID 12615 Rev 5
3.6
Optional second programmable alarm
When the alarm 2 enable (AL2E) bit (D1 of address 13h) is set to a logic ‘1,’ registers 14h
through 18h provide control for a second programmable alarm which operates in the same
manner as the alarm function described above.
The AL2E bit defaults on initial power-up to a logic ‘0’ (alarm 2 disabled). In this mode, the
five address bytes (14h-18h) function as additional user SRAM, for a total of 12 bytes of
user SRAM.
Figure 14.
Alarm interrupt reset waveform
Figure 15.
Backup mode alarm waveform
Note:
ABE and A1IE bits = 1.
ALARM FLAG BITS (AFx)
0Fh
0Eh
00h
HIGH-Z
AI11823
IRQ/FT/OUT
VCC
IRQ/FT/OUT
AFx Bits in Flags
Register
HIGH-Z
VSO
VPFD
trec
AI11824
Table 6.
Alarm repeat modes
RPT5
RPT4
RPT3
RPT2
RPT1
Alarm setting
11111
Once per second
11110
Once per minute
11100
Once per hour
11000
Once per day
10000
Once per month
00000
Once per year
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