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Rainbow-electronics DS17887 manuals

Owner’s manuals and user’s guides for Computer hardware Rainbow-electronics DS17887.
We providing 1 pdf manuals Rainbow-electronics DS17887 for download free by document types: User Manual


Rainbow electronics DS17887 User Manual (38 pages)


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

 

Table of contents

ORDERING INFORMATION

2

PIN DESCRIPTION

2

DESCRIPTION

2

OPERATION

3

SIGNAL DESCRIPTIONS

3

Figure 1. BLOCK DIAGRAM

5

DS17885 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

OSCILLATOR CONTROL BITS

13

SQUARE-WAVE OUTPUT SELECTION

13

PERIODIC INTERRUPT 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

DS17885/DS17887

20

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

DS17885 24-PIN DIP

35

DS17885 24-PIN SO

36

DS17885 28-PIN TSOP

37

DS17887 RTC PLUS RAM

38




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