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Rainbow-electronics DS1687 manuals

Owner’s manuals and user’s guides for Computer hardware Rainbow-electronics DS1687.
We providing 1 pdf manuals Rainbow-electronics DS1687 for download free by document types: User Manual


Rainbow electronics DS1687 User Manual (38 pages)


Brand: Rainbow-electronics | Category: Computer hardware | Size: 0.35 MB |

 

Table of contents

DS1685/DS1687

1

3V/5V Real-Time Clock

1

ORDERING INFORMATION

2

TYPICAL OPERATING CIRCUIT

3

DESCRIPTION

3

OPERATION

3

SIGNAL DESCRIPTIONS

4

DS1685 ONLY

5

Figure 1. BLOCK DIAGRAM

7

OSCILLATOR STARTUP TIME

8

CLOCK ACCURACY

8

RTC ADDRESS MAP

9

10 of 38

10

11 of 38

11

CONTROL REGISTERS

12

REGISTER A

12

REGISTER B

13

REGISTER C

14

REGISTER D

14

NV RAM—RTC

15

INTERRUPT CONTROL

15

SQUARE-WAVE OUTPUT SELECTION

16

Oscillator Control Bits

16

PERIODIC INTERRUPT SELECTION

16

FREQUENCY

17

UPDATE CYCLE

18

EXTENDED FUNCTIONS

19

SILICON SERIAL NUMBER

19

CENTURY COUNTER

19

AUXILIARY BATTERY

20

WAKE-UP/KICKSTART

20

RAM CLEAR

21

128 x 8 EXTENDED RAM

22

23 of 38

23

EXTENDED CONTROL REGISTERS

24

EXTENDED CONTROL REGISTER 4A

24

EXTENDED CONTROL REGISTER 4B

25

ABSOLUTE MAXIMUM RATINGS*

27

DC ELECTRICAL CHARACTERISTICS

28

RTC AC TIMING CHARACTERISTICS

30

AC TEST CONDITIONS

30

REGISTERS

32

POWER-UP/DOWN TIMING, 5V (T

33

POWER-UP/DOWN TIMING, 3V (T

33

CAPACITANCE (T

33

WAKE-UP/KICKSTART TIMING (T

33

POWER-UP CONDITION, 3V

34

POWER-DOWN CONDITION, 3V

34

POWER-UP CONDITION, 5V

35

POWER-DOWN CONDITION, 5V

35

WAKE-UP/KICKSTART TIMING

36

37 of 38

37

38 of 38

38




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