DS1500_11 Datasheet, PDF (10/20 Pages) Maxim Integrated Products – Y2K Watchdog RTC with Nonvolatile Control

Figure 7. Block Diagram
DS1500 Y2KC Watchdog RTC with Nonvolatile Control
IRQ
SQW
X1
32.768kHz CLOCK
OSCILLATOR
X2
CLOCK ALARM AND WATCHDOG
COUNTDOWN
16 x 8
CLOCK AND CONTROL
REGISTERS
V_BAT
V_BAT
V_BAUX
GND
KS
CEI
POWER CONTROL
WRITE PROTECTION,
AND POWER-ON
RESET
Figure 8. Typical Crystal Layout
LOCAL GROUND PLANE (LAYER 2)
X1
CRYSTAL
X2
256 x 8
NV SRAM
A0–A4
DQ0–DQ7
CS
WE
OE
Maxim
DS1500
V_CCO
RST
PWR
CEO
GND
10 of 20