RS5C321B Просмотр технического описания (PDF) - RICOH Co.,Ltd.

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RS5C321B

ULTRA-COMPACT SERIAL REAL-TIME CLOCK ICs WITH 32.768kHz

RICOH Co.,Ltd. 

RS5C321A/B

APPLICATION MANUAL

CONTENTS

OUTLINE ......................................................................................................1

FEATURES....................................................................................................1

BLOCK DIAGRAM .........................................................................................2

APPLICATIONS .............................................................................................2

PIN CONFIGURATION ...................................................................................2

PIN DESCRIPTIONS ......................................................................................3

ABSOLUTE MAXIMUM RATINGS ...................................................................4

RECOMMENDED OPERATING CONDITIONS .................................................4

DC CHARACTERISTICS ................................................................................5

AC CHARACTERISTICS ................................................................................5

TIMING CHARTS ...........................................................................................6

FUNCTIONAL DESCRIPTIONS ......................................................................7

1. Addressing.................................................................................................7

2. Registers...................................................................................................8

3. Counters..................................................................................................11

USAGES......................................................................................................13

1. Read Data (For the RS5C321A) ......................................................................13

2. Write Data (For the RS5C321A).......................................................................14

3. Read Data (For the RS5C321B) ......................................................................15

4. Write Data (For the RS5C321B).......................................................................16

5. CE Pin ....................................................................................................17

6. Configuration of Oscillating Circuit ....................................................................18

7. Oscillator Halt Sensing .................................................................................19

8. Typical Power Supply Circuit...........................................................................20

9. Oscillation Frequency Adjustment.....................................................................20

10. 32.768kHz Clock Output ..............................................................................22

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