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Rainbow-electronics DS17487 manuals

Owner’s manuals and user’s guides for Computer hardware Rainbow-electronics DS17487.
We providing 1 pdf manuals Rainbow-electronics DS17487 for download free by document types: User Manual


Rainbow electronics DS17487 User Manual (38 pages)


Brand: Rainbow-electronics | Category: Computer hardware | Size: 0.42 MB |

 

Table of contents

DS17485/DS17487

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

DS17485 ONLY

6

RTC ADDRESS MAP

7

8 of 38

8

CONTROL REGISTERS

9

REGISTER A

9

LSB

9

REGISTER B

10

LSB

10

REGISTER C

11

REGISTER D

11

NV RAM–RTC

12

INTERRUPT CONTROL

12

SQUARE-WAVE OUTPUT SELECTION

13

PERIODIC INTERRUPT SELECTION

13

OSCILLATOR CONTROL BITS

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

CRYSTAL SPECIFICATIONS*

26

AC TEST CONDITIONS

27

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

DS17485 24-PIN DIP

35

DS17485 24-PIN SO

36

DS17485 28-PIN TSOP

37

DS17487 RTC PLUS RAM

38




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