Figure 7. block diagram, Figure 8. typical crystal layout, 10 of 19 – Rainbow Electronics DS1500 User Manual
Page 10: Dallas semiconductor ds1500
DS1500 Y2KC Watchdog RTC with Nonvolatile Control
10 of 19
Figure 7. Block Diagram
Figure 8. Typical Crystal Layout
CRYSTAL
X1
X2
GND
LOCAL GROUND PLANE (LAYER 2)
V
CCO
RST
PWR
CEO
256 x 8
NV SRAM
POWER CONTROL
WRITE PROTECTION,
AND POWER-ON
RESET
16 x 8
CLOCK AND CONTROL
REGISTERS
V
BAT
V
BAT
V
BAUX
GND
KS
CEI
A0–A4
DQ0–DQ7
CS
WE
OE
X1
X2
32.768kHz CLOCK
OSCILLATOR
IRQ
SQW
CLOCK ALARM AND WATCHDOG
COUNTDOWN
Dallas
Semiconductor
DS1500
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