EPSON RX8010SJ B Datasheet

RX

8010SJ

ETM37E-06

Application Manua

Real Time Clock Module

Preliminary

l

NOTICE

• This material is subject to change without notice.

• Any part of this material may not be reproduced or duplicated in any form or any means without the

written permission of Seiko Epson.

• The information about applied circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson does not assume any liability for the occurrence of infringing on any patent or copyright of a third party. This material does not authorize the licensing for any patent or intellectual copyrights.

• When exporting the products or technology described in this material, you should comply with the applicable export control laws and regulations and follow the procedures required by such laws and regulations.

• You are requested not to use the products (and any technical information furnished, if any) for the development and/or manufacture of weapon of mass destruction or for other military purposes. You are also requested that you would not make the products available to any third party who may use the products for such prohibited purposes.

• These products are intended for general use in electronic equipment. When using them in specific applications that require extremely high reliability, such as the applications stated below, you must obtain permission from Seiko Epson in advance.

• All brands or product names mentioned herein are trademarks and/or registered trademarks of their respective.

/ Space equipment (artificial satellites, rockets, etc.) / Transportation vehicles and related (automobiles, aircraft, trains, vessels, etc.) / Medical instruments to sustain life / Submarine transmitters / Power stations and related / Fire work equipment and security equipment / traffic control equipment / and others requiring equivalent reliability.

ETM37E Revision History

Rev No. Date Page Description ETM37E-01 14.Jul.2013 Release ETM37E-02 06.Sep.2013 28 Corrected a setting data of Flow chart Ex2 ETM37E-03 13.Sep.2013 1 Changed a 1. Overview.

5 Deleted contents of a 8.1 DC characteristics. 5 Corrected a fCLK to fSCL. 6 Changed a comment of 8.2.1. AC characteristics. 7 Deleted a comment of “Target spec” 7 Deleted a software command of TS sample. 20,21 Corrected a 13.3. Alarm interrupt Function. 28 Corrected a setting data of Flow chart Ex2

ETM37E-04 06.Nov.2013 4 Corrected a Item of 7. Frequency Characteristics

6 Corrected a caution of 8.2.1. AC characteristics(1)

ETM37E-05 13.Dec.2013 12 Changed a 12.2. Register table

34

ETM37E-06 25.Sep.2014 7,26

Corrected a 13.8.7. The example of the communication wave pattern Corrected a power-on reset procedure by the software command.

RX8010 SJ

This is a real-time clock module of the serial interface system that incorporates a 32.768 kHz crystal oscillator. The real-time clock function incorporates not only a calendar and clock counter for the year, month, day, day of the week, hour, minute, and second, but also a time alarm, interval timer, and time update interruption, among other

features. All of these many functions are implemented in a thin, compact SOP package, which makes it suitable for various kinds of small electronic devices.

2. Block Diagram

BUILT-IN XTAL ( 32.768 kHz )

/ IRQ1

/ IRQ2

SCL SDA

OSC

ALARM,TIMER,FOUT

TIMER, FOUT

DIVIDER

INTERRUPTS CONTROLLER

BUS INTERFACE CIRCUIT

USER RAM 128 bit

CLOCK

and

CALENDR

TIMER REGISTER

ALARM REGISTER

CONTROL

REGISTER and SYSTEM

CONTROLLER

Page − 1

ETM37E-06

RX8010 SJ

.

1.

8.

2.

7.

3./ IRQ2

6.

4.

5.

3. Terminal description

3.1. Terminal connections

N.C. N.C.

VDD / IRQ1 SCL

GND

SOP − 8pin

SDA

3.2. Pin Functions

Signal

name

SCL Input This is a shift clock input pin for serial data transmission.

SDA Input/Output This is the data input/output pin for serial data transfer.

/ IRQ1 Output

/ IRQ2 Output

VDD Supply

GND Supply

Note: Input pins are able to input up to 5.5V regardless of VDD applied voltage. Note: Open drain pins are able to Pull-up to 5.5V regardless of VDD applied voltage. Note: Connect a bypass capacitor rated at least 0.1µF between power supply pins and GND pin.

I/O Function

This pin outputs interrupt signals ("L" level) for alarm, timer, time update, and FOUT. This is an N-ch open-drain output.

This pin outputs interrupt signals ("L" level) for timer and FOUT. This is a C-MOS output.

This is a power-supply pin. This pin is connected to a ground.

Page − 2

ETM37E-06

RX8010 SJ

Unit : mm

#8

4.

External Dimensions

4.1. External Dimensions

RX8010SJ

• External dimensions

( SOP − 8 pin )

#1

0.4

7.0 ± 0.2

1.27

0° - 8°

#5

3.9 ± 0.1

#4

6.0 ± 0.2

0.22

2.65 Max.

0.6

Page − 3

ETM37E-06

RX8010 SJ

to

6.

Recommended Operating

5. Absolute Maximum Ratings

Item Symbol

GND = 0 V

Condition Rating Unit

Supply voltage V

Input voltage VIN SCL,SDA

Output voltage 1 V

Output voltage 2 V

Storage temperature T

Item Symbol

Operating supply voltage V

Clock supply voltage V

Low voltage detection V

Applied voltage when OFF V

Operating temperature

∗Minimum value of Clock supply voltage V supply voltage V

ACC

.

DD

OUT1

/IRQ2

OUT2

SDA, /IRQ1

STG

ACC

CLK

- 1.1 3.0 5.5 V

LOW

- 1.10 V

PUP

SDA, /IRQ1pin 5.5 V

T

OPR

No condensation

CLK

Between VDD and GND

When stored separately,

is the timekeeping continuation lower limit value that initialized RX8010 in operating

7. Frequency Characteristics

−0.3 ∼

without packaging

*Unless otherwise specified, GND = 0 V , Ta = −40 °C to +85 °C

Condition Min. Typ. Max. Unit

-

*Unless otherwise specified, GND = 0 V , Ta = −40 °C to +85 °C

−0.3 ∼

−55

1.6 3.0 5.5 V

−40

+6.5 V

VDD+0.3 V

+6.5 V

+125

+25 +85

°C

Item Symbol

Output frequency fo 32.768

Frequency stability Frequency/voltage

characteristics

Frequency/temperatur

e characteristics

Oscillation start time

Aging fa

∗1 )

The monthly error is equal to one minute. ( excluding offset )

∆ f / f

f / V

Top

t

STA

Ta = +25 °C VDD = 3.0 V Ta = +25 °C

VDD = 1.2 V Ta = −20 °C ∼ +70 °C VDD = 3.0 V ; +25 °C reference Ta = ±0 °C ∼ +50 °C

VDD = 1.6 V Ta = −40 °C ∼ +85 °C

VDD = 1.6 V Ta = +25 °C , VDD = 3.0 V ; first year −5

Condition Min. Typ. Max. Unit

∼

∼ ∼

5.5 V

−2

−120

1.0 s

3.0 s

5 ± 23

+2

+10

+5

( Typ. )

(∗1)

kHz

× 10−6

× 10−6 / V

× 10−6

/ year

Page − 4

ETM37E-06

RX8010 SJ

8. Electrical Characteristics

8.1. DC characteristics

*Unless otherwise specified, GND = 0 V , Ta = −40 °C to +85 °C

8.1.1.

DC characteristics ( 1 )

Item Symbol

*

Unless otherwise specified, GND = 0 V , VDD = 1.6 V ∼ 5.5 V , Ta = −40°C ∼ +85°C

Condition Min. Typ. Max. Unit

Current consumption (1)

Current consumption (2)

Current consumption (3)

Current consumption (4)

Current consumption (5)

Current consumption (6)

High-level input voltage

Low-level input voltage

High-level output voltage

Low-level output voltage

Input

leakage current

Onput

leakage current

I

DD1

Input pins are "L" f

SCL

= 0 Hz, /IRQ1,2 = OFF

TSEL2=”1”

I

DD2

V

I

DD3

f

SCL

= 0 Hz, /IRQ2 = OFF,

V

DD

= 5 V

= 3 V

= 5 V

350

160 320

0.60 1.10

/IRQ1 : 32.768 kHz ON

I

DD4

I

DD5

f

SCL

= 0 Hz, /IRQ1 = OFF,

V

DD

= 3 V

V

DD

= 5 V

0.52 0.90

0.45 1.10

/IRQ2 : 1024 Hz ON ,

I

V

CL = 15 pF

DD6

VIH SCL,SDA pin

VIL SCL, SDA pin

OH1

V

DD

= 3 V

VDD=5 V, IOH=−1 mA

0.40 0.90

0.8 × V

GND − 0.3

5.5 V

DD

4.5 5.0

/IRQ2 pin

V

OH2

V

OL1

VDD =3 V, IOH=−0.5 mA VDD =5 V, IOL=1 mA GND GND +0.5

2.7 3.0

/IRQ2 pin

V

OL2

VDD =3 V, IOL=0.5 mA GND GND +0.3

V

OL4

VDD =5 V, IOL=1 mA GND

/IRQ1 pin

V

OL5

VDD =3 V, IOL=1 mA GND GND +0.4

ILK

IOZ

Input pin, VIN = VDD or GND −0.1 Input pin, V

OUT

= VDD or GND −0.1

0.1

0.2 × V

GND +0.25

DD

nA

µA

V

µA µA

Page − 5

ETM37E-06

RX8010 SJ

t

SU ; STA

SDA

SCL

t

SU ; STA

8.2. AC characteristics

8.2.1. AC characteristics(1)

Item Symbol

SCL clock frequency Start condition setup time Start condition hold time Data setup time Data hold time Stop condition setup time Bus idle time between

start condition and stop condition Time when SCL = "L" Time when SCL = "H" Rise time for SCL and SDA Fall time for SCL and SDA

Allowable spike time on bus t

• Timing chart

Protocol

START

CONDITION

(S)

t

LOW

BIT 7 MSB

(A7)

t

HIGH

*

Unless otherwise specified, GND = 0 V , VDD= 1.6 V ∼ 5.5 V , Ta = −40°C ∼ +85°C

Standard-Mode

(f

SCL

=100kHz)

Fast-Mode

(f

SCL

=400kHz)

Min. Max. Min. Max.

f

SCL

100 400 kHz

t

SU;STA

t

HD;STA

t

SU;DAT

t

HD;DAT

t

SU;STO

t

BUF

t

LOW

t

HIGH

t

r

t

f

SP

1 / f

SCL

4.7 0.6

4.0 0.6

250 100 ns

0 0 ns

4.0 0.6

4.7 1.3

4.0 0.6

1.0 0.3

0.3 0.3 50 50 ns

BIT 6

(A6)

BIT 0

LSB

(R/W)

ACK

(A)

STOP

CONDITION

(P)

START

CONDITION

(S)

Unit

µs µs

µs µs µs

(S)

t

r

t

f

(A)

t

HD ; STA

t

SU ; DAT

t

HD ; DAT

t

SP

Caution: When communication of I2C-bus is started, consumption electric currents increase.

When accessing this device, all communication from transmitting the start condition to transmitting the stop condition after access should be completed within 0.95 seconds. If such communication requires 0.95 seconds or longer, the I2C bus interface is reset by the internal bus timeout function.

8.2.2. AC characteristics (2)

Item Symbol

FOUT symmetry (/IRQ2) SYM 50% V

*

Unless otherwise specified, GND = 0 V , VDD= 1.6 V ∼ 5.5 V , Ta = −40°C ∼ +85°C

Condition Min. Typ. Max. Unit

DD Level

40 50 60 %

t

SU ; STO

(P)

t

BUF

(S)

t

HD ; STA

Page − 6

ETM37E-06

RX8010 SJ

Power supply

VDD

tR1

Backup mode

tCL

IF

Access is

im

possible

Valid V

voltage range

tF

9. Matters that demand special attention on use

9.1. Instructions in the power on

9.1.1. Characteristic for the fluctuation of the power supply

∗tR1 is restrictions to validate power-on reset. When cannot keep this standard, power-on reset does not work normally. It is necessary to initial setting by the software command. Repeated ON/OFF of the power supply in short term, the power-on reset becomes unstable. After power-OFF, keep a state of VDD=GND more than 60 seconds to validate power-on reset.

When it is impossible, please perform initial setting by the software command.

VDD

V

CLK

GND

Access is possible

Item Symbol

Power supply rise time access wait time (Initial power on) access wait time ( Normal power on)

tR1 tCL tCU

Condition Min. Typ. Max. Unit

GND – VDD

-

40 - - ms

A power-on reset procedure by the software command

1) Power- on

2) Wait: At least 40ms.

3) Dummy read. ∗1

4) Check VLF bit = “1”

5) Write 00[h] Address:Reg-1F[h]

6) Write 80[h] Address:Reg-1F[h]

7) Write D3[h] Address:Reg-60[h]

8) Write 03[h] Address:Reg-66[h]

9) Write 02[h] Address:Reg-6B[h]

10) Write 01[h] Address:Reg-6B[h]

11) Wait: At least 2ms *2 END

A disappearance of the FOUT output when the voltage sharply went up and down.

For example, VDD voltage of the RX8010 is come and go between Main power and backup battery. The clock output from output pins disappears then during several milli-seconds when a sharp voltage change happens. Please check that there is not a problem by this characteristic on your system.

An reference example of a power up and down timing without affect to FOUT.

5.5V

1.6 V

DD

for using FOUT.

FOUT

∗1 Dummy read The location of the address is arbitrary. Do not check ACK/NACK from RX8010.

∗2 Wait: At least 2ms This wait time is necessary before transmitting

the command for clearing VLF bit after software command transmission.

tR

FOUT

tCU

1 - 100 µs / V

FOUT

Please make speed to descend of a power supply voltage loose than 4 ms/V.

tR

FOUT

Please make speed to rise of a power supply voltage loose than 4 ms/V.

Page − 7

ETM37E-06

RX8010 SJ

• Normal access is enabled

4

0 [ ms ]

Note: After

4

0 (ms) has elapsed, access is enabled.

9.2.

Restrictions on Access Operations during Power-on Initialization and Recovery from Backup

• RTC-register operations are linked to the internal quartz oscillator's clock signal, so normal operation is not possible if there is no internal oscillation (= oscillation is stopped).

Therefore, we recommend that the initial setting to be set during power-on initialization or backup and restore operations (i.e., when the power supply voltage is recovered after oscillation has stopped due to a voltage drop, etc.) should be "first start internal oscillation, then wait for the oscillation stabilization time (see tSTA standard) to elapse".

• Note the following caution points concerning access operations during power-on initialization or when restoring the power supply voltage from backup mode (here after referred to as "switching to the operating voltage").

1) Before switching to the operating voltage, read the VLF-bit (which indicates the RTC error status).

2) Initialization is required when the value read from the VLF-bit is "VLF = 1 (error status)". Before initializing in response to this VLF = "1" result, we recommend first waiting for the internal oscillation

stabilization time (see the tSTA standard) to elapse.

Initialization is required when the status after reading a VLF-bit value of "1" is either of the following. (Status 1) During power-on initialization

(Status 2) When the clock setting is invalid, such as due to a voltage drop during backup

∗ Access timing during power-on initialization and when recovering the power supply voltage after a drop in the voltage used to maintain the clock

V

DD

(illustration)

During power-on initialization or power supply voltage recovery after drop in clock maintenance voltage

Internal oscillation

Oscillation start voltage [v] Minimum voltage for clock maintenance V

t

STA [ s ]

Oscillation start time

(internal oscillation wait time)

However, access guarantee range is address 20h

∼2Fh.

( Min. )

CLK

[ V ]

• Normal operation is enabled

Page − 8

ETM37E-06

EPSON RX8010SJ B Datasheet

Specifications and Main Features

Frequently Asked Questions

User Manual

NOTICE

Contents

1. Overview

2. Block Diagram

3. Terminal description

3.1. Terminal connections

3.2. Pin Functions

External Dimensions

4.1. External Dimensions

Recommended Operating

5. Absolute Maximum Ratings

7. Frequency Characteristics

8. Electrical Characteristics

8.1. DC characteristics

8.2. AC characteristics

9. Matters that demand special attention on use

9.1. Instructions in the power on

Restrictions on Access Operations during Power-on Initialization and Recovery from Backup