I2C-RTC Gravitech, I2C-RTC Datasheet - Page 4

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I2C-RTC

Manufacturer Part Number
I2C-RTC
Description
Clock & Timer Development Tools I2C REAL-TIME CLOCK
Manufacturer
Gravitech
Type
RTCr
Datasheet

Specifications of I2C-RTC

Rohs
yes
Product
I2C-RTC Boards
Tool Is For Evaluation Of
DS1340-33
Frequency
100 kHz to 400 kHz
Operating Supply Voltage
2.97 V to 5.5 V
Dimensions
1.05 in x 0.8 in
Interface Type
I2C
value of the OUT bit. This open-drain pin
requires an external pull-up resistor, and
operates with either VCC or VBACKUP
applied.
This is a backup power source. 3V coin
battery is required to hold the data when
there is no power applies to VCC. The
compatible coin cell batteries are BR1216,
CR1216, BR1220, CL1220, CR1220 and
BR1225. The battery voltage must be in
between
operation.
Insert the battery into holder with positive
side up.
Write = 0xD0
Read = 0xD1
The green LED on the module is
illuminating when the power applied. The
power-on LED is enabled from the
manufacture. It can be disabling for light
sensitive or low current requirement
application by remove the solder bridge
on “LD” at the bottom of the module.
Battery holder:
I
Power-on LED:
2
C address:
Module Configuration
1.3V
Copyright © 2007 MicroResearch
GRAVITECH GROUP
to
I2C-RTC
3.7V
for
TM
User Manual
proper
I
2
C Real-time Clock
WWW.GRAVITECH.US
I
up resistors on SDA and SCL pin. I2C-
RTC come with these two pull-up resistors
enabled from the manufacture. It can be
disabling when connect to I
already have pull-up resistors by remove
the solder bridge on the “PU” at the
bottom of the module.
Below are the default settings from the
manufacture.
2
I
C bus specification required to have pull-
2
C pull-up resistors:
2
C bus that

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