DS1284QSLASHR datasheet(4/18 Pages) DALLAS

tên linh kiện	DS1284Q/R

Giải thích chi tiết về linh kiện	Watchdog Timekeepers

PDF	18 Pages

Scroll/Zoom	100%

nhà sản xuất	DALLAS [Dallas Semiconductor]

Trang chủ	https://www.maximintegrated.com/en.html

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4 / 18 page

DS1284/DS1286

4 of 18

DIP

EDIP

PLCC

NAME

FUNCTION

VCC

Primary Power-Supply Input. When voltage is applied within

normal limits, the device is fully accessible and data can be

written and read. When a backup supply is connected to the

device and VCC is below VTP, read and writes are inhibited.

However, the timekeeping function continues unaffected by the

lower input voltage.

Figure 1. Block Diagram

Internal Registers

Internal Counters

Internal Registers

Oscillator

÷ 8

÷ 40.96

PF delay

÷ 10

Update seconds through

years and check time of

day alarm

User RAM

50 Bytes

Command

External Registers,

clock, calendar,

time of day alarm

Power

Switch

÷ 4

Swap

pins

External

Registers

Hundredths of

Seconds

External

Registers

Watchdog Alarm

Internal Counters

Data I/O Buffers

A0-A5

BAT

SQW

INTA

INTB/

(INTB)

1024Hz

TD INT

WD INT

DS1286

only

100Hz

DS1286 only

GND

DQ0–DQ7

DS1284/DS1286

IBH

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