RX5C348A/B_95 查看數據表（PDF） - RICOH Co.,Ltd.

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RX5C348A/B_95

4-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICS WITH VOLTAGE MONITORING FUNCTION

RICOH Co.,Ltd. 

R×5C348A/B

APPLICATION MANUAL

CONTENTS

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

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

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

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

SELECTION GUIDE.......................................................................................2

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

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

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

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

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

AC ELECTRICAL CHARACTERISTICS...........................................................6

GENERAL DESCRIPTION..............................................................................7

FUNCTIONAL DESCRIPTIONS ......................................................................9

1. Address Mapping .........................................................................................9

2. Register Settings........................................................................................10

USAGES .....................................................................................................22

1. Data Transfer Formats .................................................................................22

2. Configuration of Oscillation Circuit and Correction of Time Count Deviations .................28

3. Oscillation Halt Sensing and Supply Voltage Monitoring ..........................................33

4. Alarm and Periodic Interrupt...........................................................................35

5. 32-kHz Clock Output ...................................................................................38

6. Typical Applications ....................................................................................39

7. Typical Characteristics .................................................................................42

8. Typical Software-based Operations ..................................................................44

PACKAGE DIMENSIONS .............................................................................48

TAPING SPECIFICATIONS ...........................................................................49

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