Micro crystal RV-8263-C7 Istruzioni per l’uso

RV-8263-C7

Application Manual

January 2019 1/61 Rev. 1.0

Application

Manual

RV-8263-C7

Ultra Small

Real-Time Clock Module

with I2C-Bus Interface

Micro Crystal

Ultra Small Real-Time Clock Module with I2C-Bus Interface RV-8263-C7

January 2019 2/61 Rev. 1.0

TABLE OF CONTENTS

1. OVERVIEW..................................................................................................................................................... 4

GENERAL DESCRIPTION......................................................................................................................... 41.1.

APPLICATIONS......................................................................................................................................... 51.2.

ORDERING INFORMATION...................................................................................................................... 51.3.

2. BLOCK DIAGRAM .........................................................................................................................................6

PINOUT ...................................................................................................................................................... 72.1.

PIN DESCRIPTION .................................................................................................................................... 72.2.

FUNCTIONAL DESCRIPTION................................................................................................................... 82.3.

DEVICE PROTECTION DIAGRAM ........................................................................................................... 92.4.

3. REGISTER ORGANIZATION.......................................................................................................................10

REGISTER OVERVIEW...........................................................................................................................103.1.

CONTROL REGISTERS.......................................................................................................................... 113.2.

TIME AND DATE REGISTERS................................................................................................................ 143.3.

ALARM REGISTERS...............................................................................................................................173.4.

TIMER REGISTERS................................................................................................................................. 20

3.5.

REGISTER RESET VALUES SUMMARY...............................................................................................213.6.

4. DETAILED FUNCTIONAL DESCRIPTION..................................................................................................22

POWER ON RESET (POR)...................................................................................................................... 224.1.

SOFTWARE RESET ................................................................................................................................ 224.2.

OSCILLATOR STOP FLAG..................................................................................................................... 234.3.

SETTING AND READING THE TIME......................................................................................................244.4.

INTERRUPT OUTPUT ............................................................................................................................. 254.5.

ALARM FUNCTION .................................................................................................................................264.6.

ALARM INTERRUPT ........................................................................................................................ 264.6.1.

COUNTDOWN TIMER FUNCTION..........................................................................................................274.7.

TIMER FLAG TF ...............................................................................................................................274.7.1.

TIMER INTERRUPT MODE TI_TP...................................................................................................274.7.2.

PULSE GENERATOR 2.................................................................................................................... 274.7.3.

USE OF THE COUNTDOWN TIMER ............................................................................................... 284.7.4.

MINUTE AND HALF MINUTE INTERRUPT FUNCTION ........................................................................ 304.8.

PULSE GENERATOR 1.................................................................................................................... 304.8.1.

FREQUENCY OFFSET COMPENSATION .............................................................................................314.9.

OFFSET COMPENSATION CALCULATION WORKFLOW............................................................. 324.9.1.

COMPENSATION INTERRUPT FUNCTION........................................................................................... 344.10.

COMPENSATION PULSES WHEN MODE = 0 (NORMAL MODE).................................................344.10.1.

COMPENSATION PULSES WHEN MODE = 1 (FAST MODE) .......................................................354.10.2.

CLKOUT FREQUENCY SELECTION ..................................................................................................... 364.11.

STOP BIT FUNCTION.............................................................................................................................. 374.12.

Micro Crystal

Ultra Small Real-Time Clock Module with I2C-Bus Interface RV-8263-C7

January 2019 3/61 Rev. 1.0

5. I2C INTERFACE............................................................................................................................................ 39

BIT TRANSFER ....................................................................................................................................... 395.1.

START AND STOP CONDITIONS ..........................................................................................................395.2.

DATA VALID............................................................................................................................................ 405.3.

SYSTEM CONFIGURATION....................................................................................................................405.4.

ACKNOWLEDGE.....................................................................................................................................415.5.

SLAVE ADDRESS ...................................................................................................................................425.6.

WRITE OPERATION................................................................................................................................ 425.7.

READ OPERATION AT SPECIFIC ADDRESS.......................................................................................435.8.

READ OPERATION .................................................................................................................................435.9.

6. ELECTRICAL SPECIFICATIONS................................................................................................................44

ABSOLUTE MAXIMUM RATINGS.......................................................................................................... 446.1.

OPERATING PARAMETERS.................................................................................................................. 456.2.

OSCILLATOR PARAMETERS................................................................................................................ 486.3.

XTAL FREQUENCY VS. TEMPERATURE CHARACTERISTICS ...................................................486.3.1.

I2C-BUS CHARACTERISTICS.................................................................................................................496.4.

7. APPLICATION INFORMATION...................................................................................................................50

OPERATING RV-8263-C7 .......................................................................................................................507.1.

OPERATING RV-8263-C7 WITH BACKUP CAPACITOR...................................................................... 517.2.

8. PACKAGE .................................................................................................................................................... 52

DIMENSIONS AND SOLDER PAD LAYOUT.......................................................................................... 528.1.

RECOMMENDED THERMAL RELIEF .............................................................................................528.1.1.

MARKING AND PIN #1 INDEX................................................................................................................ 538.2.

9. MATERIAL COMPOSITION DECLARATION & ENVIRONMENTAL INFORMATION............................... 54

HOMOGENOUS MATERIAL COMPOSITION DECLARATION .............................................................549.1.

MATERIAL ANALYSIS & TEST RESULTS ............................................................................................ 559.2.

RECYCLING MATERIAL INFORMATION .............................................................................................. 569.3.

ENVIRONMENTAL PROPERTIES & ABSOLUTE MAXIMUM RATINGS .............................................579.4.

10. SOLDERING INFORMATION ......................................................................................................................58

11. HANDLING PRECAUTIONS FOR MODULES WITH EMBEDDED CRYSTALS........................................ 59

12. PACKING & SHIPPING INFORMATION..................................................................................................... 60

13. COMPLIANCE INFORMATION ...................................................................................................................61

14. DOCUMENT REVISION HISTORY..............................................................................................................61

Micro Crystal

Ultra Small Real-Time Clock Module with I2C-Bus Interface RV-8263-C7

January 2019 4/61 Rev. 1.0

RV-8263-C7

Ultra Small Real-Time Clock Module with I2C-Bus Interface

1. OVERVIEW

RTC module with built-in “Tuning Fork” crystal oscillating at 32.768 kHz

Counters for seconds, minutes, hours, date, weekday, month and year

Programmable Offset register for frequency adjustment

Automatic leap year calculation (2000 to 2099)

Alarm Interrupts for second, minutes, hour, date and weekday settings

Countdown Timer Interrupt function

Minute and Half Minute Interrupt

Oscillator stop detection function

Internal Power-On Reset (POR)

Programmable Clock Output for peripheral devices (32.768 kHz, 16.384 kHz, 8.192 kHz, 4.096 kHz, 2.048

kHz, 1.024 kHz and 1 Hz) with enable/disable function (CLKOE)

I2C-bus interface (up to 400 kHz)

Wide operating voltage range: 0.9 V to 5.5 V

Wide interface operating voltage: 1.8 to 5.5 V

Very low current consumption: 190 nA (VDD = 3.0 V, TA = 25°C)

Operating temperature range: -40 to +85°C

Ultra small and compact C7 package size, RoHS-compliant and 100% lead-free: 3.2 x 1.5 x 0.8 mm

Automotive qualification according to AEC-Q200 available

GENERAL DESCRIPTION1.1.

The RV-8263-C7 is a CMOS real-time clock/calendar module optimized for low power consumption. An Offset

transferred over an I2C-bus interface for communication with a host controller. The register address is incremented

automatically after each written or read data byte.

This ultra small RTC module has been specially designed for miniature and cost sensitive high volume

applications.

Micro Crystal

Ultra Small Real-Time Clock Module with I2C-Bus Interface RV-8263-C7

January 2019 5/61 Rev. 1.0

APPLICATIONS1.2.

The RV-8263-C7 RTC module combines standard RTC functions in high reliable, ultra-small ceramic package:

Smallest RTC module (embedded XTAL) in an ultra-small 3.2 x 1.5 x 0.8 mm lead-free ceramic package

Price competitive

The unique size and the competitive pricing make this product perfectly suitable for many applications:

Communication: IoT / Wearables / Wireless Sensors and Tags / Handsets

Automotive: M2M / Navigation & Tracking Systems / Dashboard / Tachometers / Engine Controller

Car Audio & Entertainment Systems

Metering: E-Meter / Heating Counter / Smart Meters / PV Converter

Outdoor: ATM & POS systems / Surveillance & Safety systems / Ticketing Systems

Medical: Glucose Meter / Health Monitoring Systems

Safety: DSLR / Security & Camera Systems / Door Lock & Access Control

Consumer: Gambling Machines / TV & Set Top Boxes / White Goods

Automation: DSC / Data Logger / Home & Factory Automation / Industrial and Consumer Electronics

ORDERING INFORMATION1.3.

Example: RV-8263-C7 TA QC

Code

Operating temperature range

TA (Standard)

-40 to +85°C

Code

Qualification

QC (Standard)

Commercial Grade

Automotive Grade AEC-Q200

Micro Crystal

Ultra Small Real-Time Clock Module with I2C-Bus Interface RV-8263-C7

January 2019 6/61 Rev. 1.0

2. BLOCK DIAGRAM

SYSTEM

CONTROL

LOGIC

INPUT

OUTPUT

CONTROL

RESET

CLKOUT

VSS

VDD POWER

CONTROL

XTAL

OSC DIVIDER

FREQUENCY

OFFSET

COMPENSATION

CLKOE

Seconds Alarm

Year

Month

Weekday

Date

Hours

RAM

Offset

Control2

Control1

Date Alarm

Hours Alarm

Minutes Alarm

Seconds

INT

Minutes

Timer Mode

Timer Value

Weekday Alarm

SCL

SDA I2C-BUS

INTERFACE

Micro Crystal

Ultra Small Real-Time Clock Module with I2C-Bus Interface RV-8263-C7

January 2019 7/61 Rev. 1.0

PINOUT2.1.

PIN DESCRIPTION2.2.

Symbol

Pin #

Description

Not connected. Is internally connected and should be left floating.

VSS

Ground.

CLKOE

Input to enable the CLKOUT pin. If CLKOE is HIGH, the CLKOUT pin is in output mode. When

CLKOE is tied to Ground, the CLKOUT pin is LOW.

INT



Interrupt Output; open-drain; active LOW; requires pull-up resistor; Used to output alarm, minute,

half minute, countdown timer and compensation Interrupt signals.

VDD

Power Supply Voltage.

CLKOUT

Clock Output; push-pull; controlled by CLKOE. If CLKOE is HIGH (VDD), the CLKOUT pin drives the

square wave of 32.768 kHz, 16.384 kHz, 8.192 kHz, 4.096 kHz, 2.048 kHz, 1.024 kHz or 1 Hz

(Default value is 32.768 kHz). When CLKOE is tied to Ground, the CLKOUT pin is LOW.

SCL

I2C Serial Clock Input; requires pull-up resistor.

SDA

I2C Serial Data Input-Output; open-drain; requires pull-up resistor.

RV-C7 Package: (top view)

#1 #4

#5#8 8263

#1 NC

#2 VSS

#3 CLKOE

#4 INT



#5 VDD

#6 CLKOUT

#7 SCL

#8 SDA

Micro Crystal

Ultra Small Real-Time Clock Module with I2C-Bus Interface RV-8263-C7

January 2019 8/61 Rev. 1.0

FUNCTIONAL DESCRIPTION2.3.

The RV-8263-C7 is a low power CMOS real-time clock/calendar module with embedded 32.768 kHz Crystal. The

CMOS IC contains 18 8-bit registers with an auto-incrementing register address, a frequency divider which

provides the source clock for the Real Time Clock (RTC), a programmable clock output, and an I2C-Bus interface

(2 wires). An Offset register allows to digitally compensating the frequency deviation of the 32.768 kHz oscillator.

The built-in address register will increment automatically after each read or write of a data byte up to the register

11h. After register 11h, the auto-incrementing will wrap around to address 00h (see following Figure).

Handling address registers:

00h

01h

02h

03h

0Fh

10h

11h

Address

wrap around

auto-

increment

All registers (see REGISTER OVERVIEW) are designed as addressable 8-bit parallel registers although not all bits

are implemented.

The first two registers (memory address 00h and 01h) are used as control and status register.

The register at address 02h is an Offset register allowing the compensation of time deviation.

The register at address 03h is a free User RAM byte.

The addresses 04h through 0Ah are used as counters for the clock function (seconds up to year counters).

Address locations 0Bh through 0Fh contain alarm registers which define the conditions for an alarm.

The registers at 10h and 11h are for the timer function.

The Seconds, Minutes, Hours, Date, Month and Year as well as the corresponding alarm registers are all coded in

Binary Coded Decimal (BCD) format. When one of the RTC registers is written or read, the contents of all time

counters are frozen. Therefore, faulty writing or reading of the clock and calendar during a carry condition is

prevented for up to 1 second.

Micro Crystal

Ultra Small Real-Time Clock Module with I2C-Bus Interface RV-8263-C7

January 2019 9/61 Rev. 1.0

DEVICE PROTECTION DIAGRAM2.4.

VDD

VSS

SDANC

CLKOE CLKOUT

SCL

INT

4 5

Micro Crystal

Ultra Small Real-Time Clock Module with I2C-Bus Interface RV-8263-C7

January 2019 10/61 Rev. 1.0

3. REGISTER ORGANIZATION

Registers are accessed by selecting a register address and then performing read or write operations. Multiple

reads or writes may be executed in a single access, with the address automatically incrementing after each byte.

18 registers (00h –11h) are available. The time registers are encoded in the Binary Coded Decimal format (BCD)

to simplify application use. Other registers are either bit-wise or standard binary format. When one of the RTC

registers is written or read, the contents of all time counters are frozen for up to 1 second. Therefore, faulty writing

or reading of the clock and calendar during a carry condition is prevented.

After reset, all registers are set according to Table in section REGISTER RESET VALUES SUMMARY.

Address

Function

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

00h

Control1

TEST

STOP

CIE

12_24

CAP

01h

Control2

AIE

HMI

02h

Offset

MODE

OFFSET

03h

RAM

RAM data

04h

Seconds

05h

Minutes

06h

Hours (24 hour)

Hours (12 hour)

AMPM

07h

Date

08h

Weekday

09h

Month

0Ah

Year

0Bh

Seconds Alarm

AE_S

0Ch

Minutes Alarm

AE_M

0Dh

Hours Alarm (24h)

AE_H

Hours Alarm (12h)

AMPM

0Eh

Date Alarm

AE_D

0Fh

Weekday Alarm

AE_W

10h

Timer Value

128

11h

Timer Mode

TIE

TI_TP

Bit positions labeled as X are not implemented and will return a 0 when read.

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