em3027 EM Microelectronic, em3027 Datasheet - Page 2
em3027
Manufacturer Part Number
em3027
Description
Real-time Clock With I2c Or Spi Interface, Crystal Temperature Compensation, Battery Switchover And Trickle Charger
Manufacturer
EM Microelectronic
Datasheet
1.EM3027.pdf
(27 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
em3027IDS
Manufacturer:
EM
Quantity:
20 000
Part Number:
em3027IDSSO8B+
Manufacturer:
EMMICRO
Quantity:
20 000
Table of contents
Table of contents..................................................................................................................................................................... 2
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13
Copyright © 2008, EM Microelectronic-Marin SA
07/08 – rev B
2.1
2.2
2.3
2.4
4.1
4.2
4.3
4.4
7.1
7.2
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
8.11
8.12
8.13
9.1
9.2
10.1
10.2
12.1
12.2
Packages / Pin Out Configuration .................................................................................................................................... 3
Absolute Maximum Ratings.............................................................................................................................................. 4
Electrical Characteristics .................................................................................................................................................. 4
EM 3027 Block Diagram and Application Schematic........................................................................................................ 6
Memory Mapping.............................................................................................................................................................. 9
Definitions of terms in the memory mapping .................................................................................................................. 10
Serial communication ..................................................................................................................................................... 12
Functional Description.................................................................................................................................................... 15
Power Management ....................................................................................................................................................... 19
Handling Procedures................................................................................................................................................. 4
Operating Conditions ................................................................................................................................................ 4
Crystal characteristics ............................................................................................................................................... 4
EEPROM Characteristics .......................................................................................................................................... 4
Block Diagram........................................................................................................................................................... 6
Application Schematic ............................................................................................................................................... 6
Crystal Thermal Behaviour........................................................................................................................................ 7
Crystal Calibration..................................................................................................................................................... 8
How to perform READ/WRITE through I2C ............................................................................................................ 12
How to perform READ/WRITE through SPI ............................................................................................................ 13
Start after power-up ................................................................................................................................................ 15
Normal Mode functionality....................................................................................................................................... 15
Watch and Alarm functionality................................................................................................................................. 15
Timer function ......................................................................................................................................................... 15
Temperature sensor................................................................................................................................................ 16
Temperature compensation .................................................................................................................................... 16
EEPROM memory................................................................................................................................................... 16
RAM User Memory.................................................................................................................................................. 17
Status Register........................................................................................................................................................ 18
Power Supplies, Switchover and Trickle Charge..................................................................................................... 19
Low Supply Detection ............................................................................................................................................. 20
AC Characteristics .................................................................................................................................................. 21
Using EM3027 with disturbed Supply Voltage on V
Package Information ............................................................................................................................................... 26
Ordering Information ............................................................................................................................................... 27
Interrupts ............................................................................................................................................................ 18
Self-Recovery System ........................................................................................................................................ 18
Register Map ...................................................................................................................................................... 18
Xtal Oscillator and Prescaler .............................................................................................................................. 18
AC characteristics – I2C ..................................................................................................................................... 21
AC characteristics – SPI..................................................................................................................................... 23
TSSOP-08/14 ..................................................................................................................................................... 26
SO-8................................................................................................................................................................... 26
R
CC
............................................................................................. 25
2
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