CBM1307
OPERATION INSTRUCTION
FEATURES
GENERAL DESCRIPTION
Count of seconds, minutes, hours, week
CBM1307 is essentially the binary –
decimal digital watch with a calendar, it has
the additional 56 bytes of the power
self-sufficient static RAM and possesses the
low power consumption. The addresses and
data are applied consecutively via the
two-wire bi-directional bus. The microcircuit
is intended for count of the real time in hours,
minutes and seconds, count of week days,
date, month and year. The last day of the
month is automatically adjusted for the
months of less, than 31 days, including
correction for the leap year. The watches
function in the 24-hour format or in the
12-hour format with the AM / PM-indicator.
CBM1307 has the built-in power supply
control circuit, which determines the supply
disruption and automatically switches over
the device into the battery mode.
days, date, months and years with
consideration of the leap years (before
2100);
56 bytes of the power self-sufficient RAM
for the data storage;
Two-wire consecutive interface;
Programmable rectangular output signal;
Automatic determination of the supply
voltage drop and the switching diagram;
Consumption of less than 500nА in the
back-up supply mode with the operating
generator;
Temperature range of the industrial
application: -40℃ – +85℃
Accuracy is better than ±1 minute per
month
PIN DISCRIPTION
Pin
1
Symbol
X1
I/O
In
Pin Description
Pin for connection of the quartz resonator
Pin for connection of the quartz resonator
Pin for battery
2
X2
In
3
VBAT
GND
SDA
In
4
In
Ground pin
5
Bi
Input / output of serial data
Input of the consecutive cycle signal
Output of rectangular signal
Power supply pin
6
SCL
In
7
SQW/OUT
VCC
Out
In
8
1
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