Epson RTC-72421 A Manuals

Manuals and User Guides for Epson RTC-72421 A. We have 2 Epson RTC-72421 A manuals available for free PDF download: Applications Manual

Epson RTC-72421 A Applications Manual (29 pages)

Real Time Clock Module

Brand: Epson | Category: Control Unit | Size: 1.09 MB

Table of Contents
3
Overview
5
Block Diagram
6
Pin Connections
6
Pin Functions
7
Characteristics
8
Absolute Maximum Ratings
8
Operating Conditions
8
Frequency Characteristics and Current Consumption Characteristics
8
Electrical Characteristics (DC Characteristics)
9
Switching Characteristics (AC Characteristics)
10
When ALE Is Used
10
When ALE Is Fixed at
12
Registers
13
Register Table
13
Notes
13
Functions of Register Bits (Overview)
14
Setting the Fixed-Period Pulse Output Mode and Fixed-Period Interrupt Mode
14
Resetting the Fixed-Period Pulse Output Mode and Fixed-Period Interrupt Mode
14
Register Description
15
Timing Registers
15
- S 1 to y 10 Registers
  15
- W Register
  15
- Register (PM/AM
  15
- Y 1 and y 10 Registers
  15
- Out-Of-Range Data
  15
C D Register (Control Register
16
- HOLD Bit
  16
- BUSY Bit
  16
- IRQ FLAG Bit
  16
- 30-Second ADJ Bit
  17
C E Register (Control Register
17
- MASK Bit
  17
- ITRPT/STND Bit
  18
- T (D 2 ), T 1 (D 3 ) Bits
  18
C F Register (Control Register
19
- RESET Bit
  19
- STOP Bit
  19
- 24/12 Bit
  19
- TEST Bit
  19
Using the RTC-72421/RTC-72423
20
Power-On Procedure (Initialization)
20
Read/Write of S to W Registers
22
Write to 30-Second ADJ Bit
22
Using the CS Pin
23
- Functions
  23
- Timing
  23
- Note
  23
Power Supply Circuit Example
23
Examples of Connection to General-Purpose Microprocessor
24
Connection to Multiplexed Bus Type
24
Connection to Z80 or Compatible CPU
24
Connection to 68-Series MPU
24
Reference Data
25
Frequency Temperature Characteristics (Typical)
25
Frequency Voltage Characteristics (Typical)
25
Current Consumption Voltage Characteristics (Typical)
25
External Dimensions
26
Rtc-72421
26
Rtc-72423
26
Marking Layout
26
- Treatment of Unused Input Pins
  26
Application Notes
27
Notes on Handling
27
- Static Electricity
  27
- Noise
  27
- Voltage Levels of Input Pins
  27
Notes on Mounting
28
- Soldering Temperature Conditions
  28
- Mounting Equipment
  28
- Ultrasonic Cleaning
  28
- Mounting Orientation
  28
- Leakage between Pins
  28

Epson RTC-72421 A Applications Manual (25 pages)

Real Time Clock Module

Brand: Epson | Category: Computer Hardware | Size: 0.21 MB

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Epson RTC-72421 A Applications Manual (29 pages)

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Epson RTC-72421 A Applications Manual (25 pages)

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