User Manuals: Micro crystal RV-1805-C3 Real Time Clock

Manuals and User Guides for Micro crystal RV-1805-C3 Real Time Clock. We have 1 Micro crystal RV-1805-C3 Real Time Clock manual available for free PDF download: Applications Manual

Micro crystal RV-1805-C3 Applications Manual

Micro crystal RV-1805-C3 Applications Manual (98 pages)

Brand: Micro crystal | Category: Power Tool | Size: 2 MB

Table of Contents

Table of Contents
2
1 Overview

6
- General Description
  6
- Applications
  7
2 Block Diagram

8
- Pinout
  9
- Pin Description
  10
- Functional Description
  11
- Device Protection Diagram
  11
3 Register Organization

12
- Register Overview
  12
- Time and Date Registers
  14
- Alarm Registers
  17
- Configuration Registers
  20
- Calibration Registers
  25
  - Sleep Control Register
    27
  - Timer Registers
    28
- Oscillator Registers
  31
  - Miscellaneous Registers
    32
- Analog Control Registers
  33
  - ID Registers
    35
  - Ram Registers
    37
- Register Reset Values Summary
  39
4 Detailed Functional Description

40
- I 2 C Interface
  41
- Bus Not Busy
  41
- Bit Transfer
  41
- Start and Stop Conditions
  41
- Data Valid
  42
  - System Configuration
    42
    
    Acknowledge
    42
    
    Addressing
    43
    
    Read Operation at Specific Address
    44
    
    Write Operation
    44
    
    Read Operation
    45
    
    Xt Oscillator
    45
- Rc Oscillator
  45
  - Rtc Counter Access
    45
- Hundredths Synchronization
  46
- Generating Hundredths of a Second
  46
  - Watchdog Timer
    46
- Digital Calibration
  47
- Basic Autocalibration Operation
  50
  - Autocalibration Operation
    50
  - Xt Autocalibration Mode
    51
  - Rc Autocalibration Mode
    51
  - Autocalibration Frequency and Control
    51
    
    Autocalibration Failure
    52
    
    Cap_Rc PIN
    52
    
    Frequency Accuracy in Rc Autocalibration Mode
    52
    
    A Real World Example
    55
    
    Rc Autocalibration Timing Accuracy Example
    56
    
    Disandvantages Relative to the Xt Oscillator
    57
    
    Power Analysis
    57
  - Xt Oscillator Failure Detection
    58
    
    Interrupt Summary
    58
    
    Interrupts
    58
    
    Alarm Interrupt Airq
    59
    
    Autocalibration Failure Interrupt Acirq
    59
    
    Battery Low Interrupt Blirq
    59
    
    Countdown Timer Interrupt Tirq
    59
    
    External Interrupt Eirq
    59
    
    Watchdog Timer Interrupt Wirq
    59
    
    Xt Oscillator Failure Interrupt Ofirq
    59
    
    Power Control and Switching
    60
    
    Servicing Interrupts
    60
    
    Automatic Switchover Summary
    61
    
    Battery Low Flag and Interrupt
    61
    
    Analog Comparator
    62
    
    Pin Control and Leakage Management (Power Control)
    62
    
    Power up Timing
    63
    
    Reset Summary
    63
    
    Power up Reset
    64
    
    Watchdog Timer
    64
    
    Sleep
    65
    
    Software Reset
    65
  - Sleep Control State Machine
    65
    
    Run State
    66
    
    Sleep State
    66
    
    Swait State (Sleep_Wait State)
    66
    
    Pin Control and Leakage Management (Sleep Control)
    68
    
    Psws, Pswb and Lkp
    68
    
    Slp Protection
    68
    
    System Power Control Applications
    69
    
    Vss Power Switched
    69
    
    Reset Driven
    70
    
    VDD Power Switched
    70
    
    Interrupt Driven
    71
    
    Typical System Implementation
    71
    
    Alarms
    72
    
    Analog Input
    72
    
    Battery Low Detection
    72
    
    Countdown Timer
    72
    
    Errors
    72
    
    External Device Input
    72
    
    Wake Button/Switch
    72
    
    Power Switch Electrical Characteristics
    73
    
    Saving Parameters
    73
  - Avoiding Unexpected Leakage Paths
    73
    
    System Power Analysis
    73
    
    Using an External Rtc with Power Management
    73
    
    High Performance Processors
    74
    
    LOWER COST Mcus
    74
    
    Managing Mcu Active Power
    74
    
    Trickle Charger
    74
5 Digital Architecture Summary

75
6 Electrical Specifications

76
7 Application Information

92
- Operating Rv-1805-C3
  92
- Operating Rv-1805-C3 with Backup Battery/Supercap
  93
8 Recommended Reflow Temperature (Leadfree Soldering)

94
9 Package

95
- Dimensions and Solderpads Layout
  95
  - Marking and Pin #1 Index
    95
10 Packing & Shipping Information

96
11 Handling Precautions for Crystals or Modules with Embedded Crystals

97
12 Document Revision History

98

Advertisement

Advertisement

Related Products

Micro crystal Categories

Control Unit Power Tool

More Micro crystal Manuals