EM3027
Table of contents
Table of contents..................................................................................................................................................................... 2
1
2
Packages / Pin Out Configuration .................................................................................................................................... 3
Absolute Maximum Ratings.............................................................................................................................................. 4
2.1
Handling Procedures................................................................................................................................................. 4
Operating Conditions ................................................................................................................................................ 4
Crystal characteristics............................................................................................................................................... 4
EEPROM Characteristics.......................................................................................................................................... 4
2.2
2.3
2.4
3
4
Electrical Characteristics.................................................................................................................................................. 4
EM3027 Block Diagram and Application Schematic......................................................................................................... 6
4.1
Block Diagram........................................................................................................................................................... 6
Application Schematic............................................................................................................................................... 6
Crystal Thermal Behaviour........................................................................................................................................ 7
Crystal Calibration..................................................................................................................................................... 8
4.2
4.3
4.4
5
6
7
Memory Mapping.............................................................................................................................................................. 9
Definitions of terms in the memory mapping .................................................................................................................. 10
Serial communication..................................................................................................................................................... 12
7.1
7.2
How to perform data transmission through I2C....................................................................................................... 12
How to perform data transmission through SPI....................................................................................................... 13
8
Functional Description.................................................................................................................................................... 15
8.1
Start after power-up ................................................................................................................................................ 15
Normal Mode function............................................................................................................................................. 15
Watch and Alarm function....................................................................................................................................... 15
Timer function ......................................................................................................................................................... 16
Temperature measurement..................................................................................................................................... 16
Frequency compensation........................................................................................................................................ 16
EEPROM memory................................................................................................................................................... 17
RAM User Memory.................................................................................................................................................. 18
Status Register........................................................................................................................................................ 18
Interrupts ............................................................................................................................................................ 18
Self-Recovery System (SRS) ............................................................................................................................. 19
Register Map...................................................................................................................................................... 19
Crystal Oscillator and Prescaler ......................................................................................................................... 19
Power Management ................................................................................................................................................ 20
Power Supplies, Switchover and Trickle Charger ................................................................................................... 20
Low Supply Detection ............................................................................................................................................. 21
AC Characteristics .................................................................................................................................................. 22
AC characteristics – I2C..................................................................................................................................... 22
I2C Specification compliance ............................................................................................................................. 23
AC characteristics – SPI..................................................................................................................................... 24
Package Information ............................................................................................................................................... 26
TSSOP-08/14..................................................................................................................................................... 26
SO-8................................................................................................................................................................... 27
Ordering Information ............................................................................................................................................... 28
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
9.1
9.2
10
10.1
10.2
10.3
11
11.1
11.2
12
2
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3027-DS.doc, Version 8.0, 25-Jan-13
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