BQ4832Y Datasheet, PDF (2/18 Pages) Texas Instruments – RTC Module With 32Kx8 NVSRAM

bq4832Y
Functional Description
Figure 1 is a block diagram of the bq4832Y. The follow-
ing sections describe the bq4832Y functional operation,
including memory and clock interface, data-retention
modes, power-on reset timing, watchdog timer activa-
tion, and interrupt generation.
Truth Table
VCC
CE
< VCC (max.)
VIH
VIL
> VCC (min.)
VIL
VIL
< VPFD (min.) > VSO
X
≤ VSO
X
Figure 1. Block Diagram
OE
WE
Mode
DQ
Power
X
X
Deselect
High Z
Standby
X
VIL
Write
DIN
Active
VIL
VIH
Read
DOUT
Active
VIH
VIH
Read
High Z
Active
X
X
Deselect
High Z
CMOS standby
X
X
Deselect
High Z
Battery-backup mode
Sept. 1996 C
2