DS3030W Datasheet, PDF (15/18 Pages) Dallas Semiconductor – 3.3V Single-Piece 256kb Nonvolatile SRAM with Clock

3.3V Single-Piece 256kb Nonvolatile SRAM
with Clock
CE
WE OR OE
CS
INADVERTENT WRITE OR READ OF
RTC FLAGS REGISTER
WILL RESET IRQ/FT
A0–A3
IRQ/FT
ADDRESS 0h
Figure 2. Prevent Accidental Clearing of IRQ Waveforms
tAS
INTENTIONAL WRITE OR
READ AT ADDRESS Xh
ADDRESS Xh
HIGH IMPEDANCE
VCC
ABE, AE
AF
IRQ/FT
HIGH IMPEDANCE
Figure 3. Battery Backup Mode Alarm Waveforms
VTP
HIGH IMPEDANCE
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