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PDF IN1307N Data sheet ( Hoja de datos )
| Número de pieza | IN1307N | |
| Descripción | CMOS IC OF REAL TIME WATCH | |
| Fabricantes | IK Semiconductor | |
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TECHNICAL DATA
CMOS IC OF REAL TIME WATCH
WITH SERIAL INTERFACE, 64 Х 8 RAM
IN1307
FUNCTIONS AND FEATURES
Count of seconds, minutes, hours, week 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 500 nА in the back-up supply mode
with the operating generator;
Temperature range of the industrial application: -40С – 85С
Accuracy is better than ±1 minute per month
SOP-8
DIP-8
TA = -40 to+ 85C
for all packages
Device
IN1307N
IN1307DT
IN1307D
Ordering Information
Operating
Temperature Range
Package
TA = -40°C ~+85°C
for all packages
DIP-8
SOP-8
SOP-8
Packing
Tube
Tape& Reel
Tube
DESCRIPTION
IN1307 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. IN1307 has the built-in power supply control circuit,
which determines the supply disruption and automatically switches over the device into the battery
mode.
PIN DISCRIPTION
Pin
Symbol
I/O
Pin Description
1 X1 In Pin for connection of the quartz resonator
2 X2 In Pin for connection of the quartz resonator
3
VBAT
In Pin for battery
4
GND
In Ground pin
5
SDA
Bi Input / output of serial data
6
SCL
In Input of the consecutive cycle signal
7
SQW/OUT
Out Output of rectangular signal
8
VCC
In Power supply pin
2013, December, Ver.04
1 page  
TIMING CHART
IN1307
FUNCTIONING
IN1307 operates as the driven device on the serial bus. For access to it it is required to set
the status START and to send after the register address the device identification code. It is possi-
ble to address the next register consequently, until the status STOP is set. When VCC drops below
1.25 x VBAT, the access in progress to the device is ceased and the address counter is reset. At
this time the device does not recognize the input data, excluding the erroneous information writing.
When VCC drops below VBAT, the device switches over to the battery mode, consuming low power.
When switching on the power supply VCC above VBAT + 0.2 V, the device switches over from the
battery power supply to VCC; and recognizes the input data, when VCC becomes above 1.25 x VBAT.
ADDRESSES CHART OF RTC AND RAM
Addresses chart of the registers RTC and RAM is indicated
in the Figure. Hour registers of the real time are positioned at the
addresses 00h – 07h. RAM registers are positioned at the ad-
dresses of 08h – 3Fh. In the mode of the multi-byte access,
when reaching by the pointer of the address 3Fh, the end of the
RAM address space, there happens transition to the register with
the address 00h, beginning of the hours area.
5 2013, December, Ver.04
5 Page 
IN1307 CAN OPERATE IN THE TWO FOLLOWING MODES
IN1307
1. Mode of «slave» receiver (write mode of IN1307):
Serial data and cycles are received via SDA and SCL appropriately. After transfer of each byte the
confirmation bit is sent. The statuses START and STOP are recognized as the beginning and the
end of the serial transfer. The address recognition is performed by means of the hardware after
receipt of the “slave” address and the direction bit. The address byte isthe first byte, received after
occurrence of the START status, generated by the “master”. The address byte contains the seven
address bits of IN1307, equal to 1101000, accompanied by the direction bit ( R /W ), which for write
is equal to 0.After receipt and decoding of the address byte, DS1307 applies confirmation to the
line SDA. After confirmation by IN1307 of the “slave” address and the write bit, the «master» sends
the register address of IN1307. Thus the register indicator will be preset in IN1307. Then the
«smart» shall start to send each data byte with the subsequent receipt confirmation of each byte.
Upon completion of writing the “master” shall formulate the status STOP for termination of the data
transfer.
Data Writing- Mode of << SLAVE>> Receiver
<Slave Address>
<Word Address (n)> <Data (n)>
<Data (n+1)>
<Data (n+X)>
ss 11110011000000 00 AA XXXXXXXXXXXXXX AA XXXXXXXXXXXXXXXX AA XXXXXXXXXXXXXXXX AA XXXXXXXXXXXXXXXX AA PP
S - START
A - ACKNOWLEDGE
P - STOP
DATA TRANSFERRED ( X+1 BYTES + ACKNOWLEDGE)
*R/W - READ/WRITE OR DIRECTION BIT ADDRESS = D0h
Data Writing- mode of << SLAVE>> Receiver
11 2013, December, Ver.04
11 Page | ||
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| PDF Descargar | [ Datasheet IN1307N.PDF ] | |
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