EM3027
4
EM3027 Block Diagram and Application Schematic
4.1 Block Diagram
Switchover
VBack
VHigh
Voltage
Voltage
Regulator
Monitoring
Vcc
Vss
VREG
X1
Xtal
Prescaler
Oscillator
RTC
RAM
X2
32.768 kHz
EEPROM
Control
SCL/SCK
SI
I2C
SPI
Inputs
Stages
CS
SDA/SO
Thermometer
Output
Buffers
CLKOE
INT CLKOUT
SDA/SO
4.2 Application Schematic
Crystal Layout Example
VCC Supply
CD
X1
X2
VCC
X1
for application use
CLKOUT
Crystal
X2
VCC
EM3027
CLKOE
INT
µController
VBack
Protection
Resistor *
CS,
CD
SCL/SCK
SDA/SO
SI
Serial
Lithium
Battery
or
Interface
VSS
VSS
Super
Cap
VSS = 0V
* optional for Lithium batteries (<1k)
Figure1: Application Schematic
6
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Copyright 2013, EM Microelectronic-Marin SA
3027-DS.doc, Version 8.0, 25-Jan-13