Related Manuals for Epson RTC-9701JE
Summary of Contents for Epson RTC-9701JE
- Page 1 MQ362-03 Application Manua Real Time Clock Module RTC-9701JE Model Product Number RTC-9701JE Q4197017x000100...
- 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.
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Page 3: Table Of Contents
RTC - 9701 JE Contents 1. OVERVIEW ....................1 2. BLOCK DIAGRAM ..................1 3. TERMINAL DESCRIPTION ................2 3.1. T ......................2 ERMINAL CONNECTIONS 3.2. P ........................2 IN FUNCTIONS 4. ABSOLUTE MAXIMUM RATINGS..............3 5. RECOMMENDED OPERATING CONDITIONS ..........3 6. -
Page 4: Overview
RTC - 9701 JE Serial RTC Module with Alarm and Timer Function RTC - 9701 • Built-in 32.768 kHz crystal oscillator with frequency adjusted • Alarm interrupt function for day of the week, day, hour, and minute • Interval timer interrupt function •... -
Page 5: Terminal Description
RTC - 9701 JE 3. Terminal description 3.1. Terminal connections RTC - 9701 JE N.C. N.C. N.C. /AIRQ N.C. /TIRQ N.C. N.C. N.C. FOUT VSOJ - 20 pin 3.2.Pin functions ∗1 Pin name Functions I / O number ∗2 RTC power (backup power). This pin is connected to the plus side of the power. −... -
Page 6: Absolute Maximum Ratings
RTC - 9701 JE 4. Absolute maximum ratings GND=0 V Item Symbol Condition Rating Unit −GND, V −GND −0.3 to +6.0 Power voltage Input pin GND−0.3 to V +0.3 Input voltage VEX pin GND−0.3 to +6.0 Output voltage /AIRQ, /TIRQ, FOUT, DO pins GND−0.3 to V +0.3 −55 to +125... -
Page 7: Ac Electrical Characteristics
RTC - 9701 JE 8. AC Electrical characteristics *If not specifically indicated, V =2.7 V to 3.6 V, V =1.8 V to 5.5 V, GND=0 V, Ta= −40 °C to +85 °C Item Symbol Condition Min. Typ. Max. Unit CLK clock cycle Vth = 50% V CLK H pulse width Vth = 50% V... -
Page 8: Voltage Detection Characteristics
RTC - 9701 JE 9. Voltage detection characteristics *If not specifically indicated, V =2.7 V to 3.6 V, =1.8 V to 5.5 V,GND=0 V, Ta= −40 °C to +85 °C 9.1. VEX voltage detection characteristics Item Signal Condition Min. Typ. Max. -
Page 9: Eeprom Memory Characteristics
RTC - 9701 JE 10. EEPROM Memory characteristics * If not specifically indicated,GND=0 V, V =2.7 V to 3.6 =1.8 V to 5.5 V, Ta=-40 °C to +85 °C V, V Item Symbol Condition Min. Typ. Max. Unit 4 kbit ( 256 × 16 bit ) −... -
Page 10: Register Table
∗3. The Resreved register used by EPSON for testing. Setting does not do. ∗4. The TEST bit is used by EPSON for testing. Be sure to set it to "0" before use. ∗5. The flag bit will cleared with “0”. ( “0” can not be replace to “1”.) 11.1.2. - Page 11 RTC - 9701 JE 11.2. Description of RTC functions (addresses between 0 and 7) The clock and the caledar consists of seconds, minutes, hours, day of the week, day, month, year and every 100 year (SEC, MIN, HOUR, WEEK, DAY, MONTH, YEAR and Y100 registers). Address Function bit 7 bit 6...
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Page 12: Alarm Functions (/Airq)
RTC - 9701 JE 11.3. Alarm functions (/AIRQ) From the conditions of the event flags (AF, EXF, VLF and VLF2), you can know the conditions when the clock matches, when the voltage decreases and when the oscillation stops. The data of these bits are kept until cleared with “0”. Also, since output to /AIRQ is possible when each event (except VLF2) is generated, interrupt can be requested to the host. - Page 13 RTC - 9701 JE 11.3.1.2. Explanation of Time alarm (2). When the alarm matches and AIE=1, the /AIRQ pin outputs “L”; when AIE=0, the /AIRQ pin is at the high impedance level. "1" "1" "1" AIE bit The AIE bit is not output in the “0” range "0"...
- Page 14 RTC - 9701 JE 11.3.2. Voltage detection function 11.3.2.1. VEX voltage decrease alarm (EXF) With the voltage detection circuitry that is independent from the other power supplies, the VEX voltage can be monitored constantly. If the voltage decreases below VEX, EXF (V Low alarm Flag) becomes “1”...
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Page 15: Timer Function (/Tirq)
RTC - 9701 JE 11.4. Timer function (/TIRQ) 11.4.1. Variable interval timer The interval period and Duty can be set for this interval timer. /TIRQ becomes “0” when TF is released or when the Duty period is expired. The data in TF is kept until it is cleared. By setting Duty to ON, the current consumption of the pull-up resistor is minimized and intermittent operations on standby are trigger locked;... -
Page 16: Control Register / Flag Register
11.5.1. Control register l TEST This bit is used by EPSON for testing. Be sure to set it to “0”. l WADA This bit sets either the WEEK alarm or the DAY alarm. For details, see the Time alarm section [11.3.1.]. -
Page 17: Read / Write Data
RTC - 9701 JE 12. Read / Write data 12.1. Serial data transfer method This is a serial data transfer method in 4 lines form (or 3 lines form). Mode, address and data are transferred in MSB-first in respective order. The first 4 bits (called mode field) determines the mode and the data size of the other fields (address and data fields). -
Page 18: Reading/Writing In Rtc Mode
RTC - 9701 JE 12.2. Reading/Writing in RTC mode. For both reading and writing, after CE input rises, set the 4-bits mode, then specify the 4-bits address, and finally read or write in 8-bits units. If the input of data in 8-bits unit is not completed before CE input falls, the 8-bits data will be ignored at the time CE input falls (the data before this is undefined). -
Page 19: Read / Write Eeprom Memory
RTC - 9701 JE 12.3. Read / Write EEPROM Memory 12.3.1. Write Enable mode (EWEN) 1) After power supply, please execute this once. 2) If data has been transferred while Busy, the Write Enable mode may be canceled. In this case, execute again the Write Enable mode. -
Page 20: External Connection Examples
RTC - 9701 JE 13. External connection examples Example 1. Circuitry when using the secondary battery (trickle charge) VCHARGE Ni-MH2Cell BATTERY C2 0.1µ RTC9701JE RESET /AIRQ IRQN /TIRQ DOUT FOUT C1 0.1µ ASIC or CPU * If trickle charged, the R1 value will vary depending on the usage and the 0.1µ... -
Page 21: External Diagram / Marking Layout
RTC - 9701 JE 14. External diagram / Marking layout 14.1. External diagram RTC - 9701 JE (VSOJ-20pin) • External dimensions • Recommended soldering pattern 7.0 ± 0.3 (0.75) 6.0 ± 0.2 0.35 0.65 (0.75) 0.65 × 9 = 5.85 1.3 1.5 Max. -
Page 22: Reference Data
RTC - 9701 JE 15. Reference data (1) Example of frequency and temperature characteristics [Finding the frequency stability] θ = +25 ° C Typ. × 10 α = -0.035 × 10 Typ. 1. Frequency and temperature characteristics can be approximated using the following equations. ∆f = α... -
Page 23: Application Notes
RTC - 9701 JE 16. Application notes 16.1. 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 24 20/F., Harbour Centre, 25 Harbour Road, Wanchai, Hong kong 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 &...