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ISL12059 Datasheet(PDF) 2 Page - Renesas Technology Corp

Part No. ISL12059
Description  Low Cost and Low Power I2C Bus Real Time Clock/Calendar Low Power and Low Cost RTC
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Maker  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
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ISL12059 Datasheet(HTML) 2 Page - Renesas Technology Corp

 
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ISL12059
FN6757 Rev 0.00
Page 2 of 11
Jun 15, 2009
Block Diagram
I2C
INTERFACE
RTC
CONTROL
LOGIC
FREQUENCY
OUT
RTC
DIVIDER
SDA
BUFFER
CRYSTAL
OSCILLATOR
POR
SCL
BUFFER
SDA
SCL
X1
X2
VDD
FT/OUT
INTERNAL
SUPPLY
SECONDS
MINUTES
HOURS
DAY OF WEEK
DATE
MONTH
YEAR
CONTROL
REGISTERS
Pin Descriptions
PIN
NUMBER
SYMBOL
DESCRIPTION
1
X1
The X1 pin is the input of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz
quartz crystal.
2
X2
The X2 pin is the output of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz
quartz crystal.
3
NC
No Connection. Can be connected to GND or left floating.
4
GND
Ground
5
SDA
Serial Data (SDA) is a bi-directional pin used to transfer serial data into and out of the device. It has an open drain
output and may be wire OR’ed with other open drain or open collector outputs.
6
SCL
The Serial Clock (SCL) input is used to clock all serial data into and out of the device.
7
FT/OUT
512Hz Frequency Output or digital output pin. The function is set via the configuration register. This pin is open drain
and requires an external pull-up resistor. It has a default output of high impedance at power-up.
8VDD
Power supply


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