EEWORLDEEWORLDEEWORLD

Part Number

Search

DS1556

Description
REAL TIME CLOCK, DMA32
Categorysemiconductor    The embedded processor and controller   
File Size390KB,20 Pages
ManufacturerDALLAS
Websitehttp://www.dalsemi.com
Download Datasheet Compare View All

DS1556 Overview

REAL TIME CLOCK, DMA32

DS1556
1M, Nonvolatile, Y2K-Compliant
Timekeeping RAM
www.maxim-ic.com
FEATURES
§
Integrated NV SRAM, Real-Time Clock
(RTC), Crystal, Power-Fail Control Circuit,
and Lithium Energy Source
Clock Registers are Accessed Identically to
the Static RAM; These Registers Reside in
the 16 Top RAM Locations
Century Byte Register (i.e., Y2K Compliant)
Totally Nonvolatile with Over 10 Years of
Operation in the Absence of Power
Precision Power-On Reset
Programmable Watchdog Timer and RTC
Alarm
BCD-Coded Year, Month, Date, Day, Hours,
Minutes, and seconds with Automatic Leap-
Year Compensation Valid Up to the Year
2100
Battery Voltage-Level Indicator Flag
Power-Fail Write Protection Allows for
±10%
V
CC
Power-Supply Tolerance
Lithium Energy Source is Electrically
Disconnected to Retain Freshness Until
Power is Applied for the First Time
Also Available in Industrial Temperature
Range: -40°C to +85°C
PIN CONFIGURATIONS
TOP VIEW
RST
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
32
Dallas
2
Semiconductor
31
3
DS1556
30
4
29
5
28
6
27
7
26
8
25
9
24
10
23
11
22
12
21
13
14
15
16
20
19
18
17
V
CC
A15
IRQ/FT
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
§
§
§
§
§
§
Encapsulated DIP
§
§
§
§
IRQ/FT
A15
A16
RST
V
CC
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Dallas
Semiconductor
DS1556
X1
GND
®
V
BAT
X2
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
N.C.
N.C.
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
PowerCap Module Board
(Uses DS9034PCX PowerCap)
PowerCap is a registered trademark of Dallas Semiconductor.
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here:
www.maxim-ic.com/errata.
1 of 20
REV: 101804

DS1556 Related Products

DS1556 DS1556-70 DS1556-70IND DS1556P-70 DS1556P-70IND DS1556W-120 DS1556W-120IND DS1556WP-120 DS1556WP-120IND
Description REAL TIME CLOCK, DMA32 REAL TIME CLOCK, PDMA32 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM REAL TIME CLOCK, DMA32 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM REAL TIME CLOCK, DMA34
Information access methods - PARALLEL, DIRECT ADDRESS - PARALLEL - PARALLEL, DIRECT ADDRESS - PARALLEL Parallel, direct address
Number of terminals - 32 - 34 - 32 - 34 34
Maximum operating temperature - 70 °C - 70 °C - 70 °C - 70 °C 85 Cel
Temperature level - COMMERCIAL - COMMERCIAL - COMMERCIAL - COMMERCIAL INDUSTRIAL
Where should I go during the Spring Festival holiday?
I feel like there are too many people everywhere. I am confused. :call:...
henryli2008 Talking
A method to convert floating point numbers to integers
[code]int ftol(double f) { union d2i { long long i; double d; }fi; ad=f+6755399441055744.0; return fi.i; };[/code] Generally, we can convert floating point numbers to integers by using (int), but such...
247153481 Embedded System
Help with problems with servo motors on CNC machine tools!
The CNC milling platform, the motor is running at a speed higher than 100 rpm, everything is normal, when drawing a circle and reversing at 0 90 180 270 degrees, the motor has low-frequency oscillatio...
eeleader Industrial Control Electronics
【Teaching Embedded Linux from Scratch】Episode 15
Lesson 15: How to send files to the development board (I) Send files to the development board through the serial port 1. Open the HyperTerminal, power on the development board, and enter the Calibri s...
babyking Embedded System
Chinese translation of the STM32 firmware library user manual
Chinese translation of the STM32 firmware library user manual[size=1][i] ST chip price query is not only on the official website: buy chips bom2buy [/i][/size]...
tommorow stm32/stm8
Problems with using IImagingFactory
#include "Imaging.h" #include#include After adding the header file, the compilation has the following problem: 1C:\Program Files\Microsoft Visual Studio 8\SmartDevices\SDK\PocketPC2003\include\Imaging...
shiminghu Embedded System

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 709  2513  1818  2077  441  15  51  37  42  9 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号