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Rainbow-electronics DS17287 manuals

Owner’s manuals and user’s guides for Computer hardware Rainbow-electronics DS17287.
We providing 1 pdf manuals Rainbow-electronics DS17287 for download free by document types: User Manual


Rainbow electronics DS17287 User Manual (38 pages)


Brand: Rainbow-electronics | Category: Computer hardware | Size: 0.40 MB |

 

Table of contents

DS17285/DS17287

1

3V/5V Real-Time Clock

1

ORDERING INFORMATION

2

PIN DESCRIPTION

2

DESCRIPTION

2

OPERATION

3

SIGNAL DESCRIPTIONS

3

Figure 1. BLOCK DIAGRAM

5

DS17285 ONLY

6

RTC ADDRESS MAP

7

CONTROL REGISTERS

9

REGISTER A

9

LSB

9

REGISTER B

10

REGISTER C

11

REGISTER D

11

NV RAM–RTC

12

INTERRUPT CONTROL

12

PERIODIC INTERRUPT SELECTION

13

OSCILLATOR CONTROL BITS

13

SQUARE-WAVE OUTPUT SELECTION

13

FREQUENCY

14

UPDATE CYCLE

15

EXTENDED FUNCTIONS

16

Silicon Serial Number

16

Century Counter

16

RTC Write Counter

16

Auxiliary Battery

17

Wake-Up/Kickstart

17

goes below V

18

RAM Clear

19

4k x 8 Extended RAM

19

20 of 38

20

EXTENDED CONTROL REGISTERS

21

EXTENDED CONTROL REGISTER 4A

21

EXTENDED CONTROL REGISTER 4B

22

23 of 38

23

ABSOLUTE MAXIMUM RATINGS*

24

OPERATING RANGE

24

25 of 38

25

PWR Output at 0.4V

25

IRQ Output at 0.4V

25

CRYSTAL SPECIFICATIONS*

26

AC TEST CONDITIONS

27

29 of 38

29

29

30 of 38

30

CS High to Power-Fail

30

POWER-UP CONDITION, 3V

31

POWER-DOWN CONDITION, 3V

31

POWER-UP CONDITION, 5V

32

POWER-DOWN CONDITION, 5V

32

WAKE-UP/KICKSTART TIMING

33

BURST MODE TIMING WAVEFORM

34

DS17285 24-PIN DIP

35

DS17285 24-PIN SO

36

DS17285 28-PIN TSOP

37

DS17287 RTC PLUS RAM

38




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