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Epson RTC-8564JE Applications Manual

Real time clock module

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MQ322-04
Application Manua
Real Time Clock Module
RTC-8564JE/NB
Model
RTC-8564JE
RTC-8564NB
Product Number
Q41856470000100
Q41856490000200
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Summary of Contents for Epson RTC-8564JE

  • Page 1 MQ322-04 Application Manua Real Time Clock Module RTC-8564JE/NB Model Product Number RTC-8564JE Q41856470000100 RTC-8564NB Q41856490000200...
  • Page 2 • Seiko Epson reserves the right to make changes to this material without notice. • Seiko Epson does not assume any liability of any kind arising out of any inaccuracies contained in this material or due to its application or use in any product or circuit and, further, there is no representation that this material is applicable to products requiring high level reliability, such as, medical products.
  • Page 3: Table Of Contents

    RTC - 8564 JE/NB CONTENTS 1. Overview ........................1 2. Block diagram ......................1 3. Terminal description..................... 2 3.1. Terminal connections........................2 3.2. Terminal functions ........................... 2 4. Absolute maximum ratings ................... 3 5. Recommended operating conditions ................3 6. Frequency characteristics .................... 3 7.
  • Page 4: Overview

    RTC - 8564 JE/NB C-Bus Interface Real Time Clock Module RTC - 8564 JE/NB • Built-in crystal oscillator running at 32.768 kHz • Compliant with I C high-speed bus specifications ( 400 kHz ) • Equipped with alarm, timer, and frequency output ( 32.768 kHz, 1024 Hz, 32 Hz, 1 Hz ) features •...
  • Page 5: Terminal Description

    RTC - 8564 JE/NB 3. Terminal description 3.1. Terminal connections RTC - 8564 NB RTC - 8564 JE / INT N.C. N.C. N.C. N.C. N.C. N.C. ( GND ) N.C. CLKOE N.C. N.C. N.C. N.C. N.C. CLKOUT N.C. N.C. N.C. CLKOUT N.C.
  • Page 6: Absolute Maximum Ratings

    RTC - 8564 JE/NB 4. Absolute maximum ratings GND=0 V Parameter Symbol Condition Min. Max. Unit −0.5 Supply Voltage Between V and GND +6.5 −50 Supply Voltage Input Voltage Input pin GND−0.5 +0.5 Output Voltage / INT pin GND−0.5 +0.5 −10 DC Input Current −10...
  • Page 7: Ac Electrical Characteristics

    RTC - 8564 JE/NB ∗ If not specifically indicated, GND=0 V, V 7.2. AC electrical characteristics =1.8 V to 5.5 V , Ta= −40 °C to +85 °C Parameter Symbol Condition Min. Typ. Max. Unit SCL clock frequency µs Start condition set-up time SU;...
  • Page 8: How To Use

    While there is a bit at address 00 for setting the test mode, the test mode is a special operation mode that is used by EPSON for testing devices. Be sure not to set it to 1. If it is set to the test mode, all operations of the device will not be guaranteed.
  • Page 9: Control Register 2

    RTC - 8564 JE/NB 8.2.2. Control register 2 Address Function bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 × Control 2 TI / TP • TI/TP ( Interrupt Signal Output Mode Select. Interrupt / Periodic ) If this bit is set to 0, when the timer counts down in the single operation mode and becomes zero, it sets the TF flag and then stops.
  • Page 10: Alarm Registers

    RTC - 8564 JE/NB • C ( Century bit ) This bit indicates change of century. When the year digit data overflows from 99 to 00, this bit is set. By presetting it to 0 while still in the 20th century, it will be set in year 2000, but in fact the first year in the 21 century should be 2001.
  • Page 11: Access Procedure

    RTC - 8564 JE/NB 8.3. Access procedure 8.3.1. Characteristic of the I C-BUS C-BUS is a bi-directional interface that uses two (2) lines. This interface has two signal lines, which are SDA (data line) and SCL (clock line). Both of these lines are connected to the V line via the pull-up registers.
  • Page 12: System Structure

    RTC - 8564 JE/NB 8.3.5. System structure A master is defined a device that controls interfacing of messages, and a slave is defined as a device which is controlled by the master. A transmitter is defined as a device transmitting messages,and a receiver is defined as the one receiving messages.
  • Page 13: I 2 C-Bus Protocol

    RTC - 8564 JE/NB 8.3.7. I C-BUS protocol The following section describes the communications procedure where the master is CPU and the slave is the RTC-8564. (1) Procedure for write at specified address The RTC-8564 has an auto increment function of address. After the initial address is set, if only data continues to be sent, the receiving address on the 8564 is incremented by 1 byte.
  • Page 14: Typical Connection To Micro Computers

    RTC - 8564 JE/NB 8.4. Typical connection to micro computers I C-BUS Master RTC-8564 SLAVE ADRS = 1010001 Pull up Registor device I C-BUS Page - 11 MQ - 322 - 04...
  • Page 15: External Dimensions / Marking Layout

    RTC - 8564 JE/NB 9. External dimensions / Marking layout 9.1. External dimensions RTC - 8564 JE ( VSOJ-20pin ) • External dimensions • Recommended soldering pattern 7.0 ± 0.3 (0.75) 0.35 0.65 (0.75) 0.65 × 9 = 5.85 1.5 Max. 0 Min.
  • Page 16: Reference Data

    RTC - 8564 JE/NB 10. Reference data (1)Example of frequency and temperature [Finding the frequency stability] characteristics θ = +25 ° C Typ. 1. Frequency and temperature characteristics can be × 10 α = -0.035 × 10 Typ. approximated using the following equations. ∆f = α...
  • Page 17: Application Notes

    RTC - 8564 JE/NB 11. Application notes 11.1. Notes on handling This module uses a C-MOS IC to realize low power consumption. Carefully note the following cautions when handling. (1) Static electricity While this module has built-in circuitry designed to protect it against electrostatic discharge, the chip could still be damaged by a large discharge of static electricity.
  • Page 18 20/F., Harbour Centre, 25 Harbour Road, Wanchai, Hong kong, China Phone: (852) 2585-4600 Fax: (852) 2827-2152 http://www.epson.com.hk EPSON ELECTRONIC TECHNOLOGY DEVELOPMENT (SHENZHEN )CO., LTD. Flat 16A, 16/F, New Times Plaza, No.1 Taizi Road, Shenzhen, China Phone (86) 755-6811118 Fax: (86) 755-6677786 EPSON TAIWAN TECHNOLOGY &...

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