Rainbow-electronics DS1500 Uživatelský manuál stáhnout pdf (Strana 10)

DS1500 Y2KC Watchdog RTC with Nonvolatile Control

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Figure 7. Block Diagram

Figure 8. Typical Crystal Layout

CRYSTAL

X1

X2

GND

LOCAL GROUND PLANE (LAYER 2)

V

CCO

R

ST

P

WR

C

EO

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

K

S

C

EI

A0–A4

DQ0–DQ7

C

S

W

E

O

E

X1

X2

32.768kHz CLOCK

OSCILLATOR

I

RQ

SQW

CLOCK ALARM AND WATCHDOG

COUNTDOWN

Dallas

Semiconductor

DS1500

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 18 19

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