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IN1307D Schematic ( PDF Datasheet ) - IK Semiconductor

Teilenummer IN1307D
Beschreibung CMOS IC OF REAL TIME WATCH
Hersteller IK Semiconductor
Logo IK Semiconductor Logo 




Gesamt 30 Seiten
IN1307D Datasheet, Funktion
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






IN1307D Datasheet, Funktion
IN1307
OSCILLATOR CIRCUIT
IN1307 uses an external 32.768kHz crystal. The oscillator circuit does not require any exter-
nal resistors or capacitors to operate. Table specifies several crystal parameters for the external
crystal.
CRYSTAL SPECIFICATIONS*
Parameter
Nominal Frequency
Series Resistance
Load Capacitance
Symbol
fo
ESR
CL
Min Typ Max
32.768
45
12.5
Unit
kHz
k
pF
*The crystal, traces, and crystal input pins should be isolated from RF generating signals.
Application Note : Crystal Considerations for Real-Time Clocks for additional specifications. See 12
page.
CLOCK ACCURACY
The accuracy of the clock is dependent upon the accuracy of the crystal and the accuracy of
the match between the capacitive load of the oscillator circuit and the capacitive load for which the
crystal was trimmed. Additional error will be added by crystal frequency drift caused by tempera-
ture shifts. Externalcircuit noise coupled into the oscillator.
OSCILLATOR CIRCUIT SHOWING INTERNAL BIAS NETWORK
.
Figure shows a functional schematic of the oscillator circuit. If using a crystal with the specified
characteristics, the startup time is usually less than one second.
6 2013, December, Ver.04

6 Page









IN1307D pdf, datenblatt
IN1307
2. Mode of «slave» Tranceiver (read-out mode from IN1307):
The first byte is received and processed as in the mode of the «slave» receiver. However, in this
mode the direction bit will signify, that the transmission direction is changed. IN1307 sends the se-
rial data by SDA, the cycle pulses - by SCL. statuses START and STOP are understood as the be-
ginning and end of the consecutive transmission. The address byte is the first byte, received after
occurrence of the status START, generated by the «master». The address byte contains the seven
bits of the address IN1307, equal to 1101000, accompanied by the direction bit ( R /W ), which is
equal to 1 for reading. After receipt and decoding of the address byte IN1307 receives confirmation
from the line SDA. Then IN1307 starts to send the data from the address, which is indicated by the
register indicator. If the register indicator is not written prior to initialization of the read mode, then
the first read address is the last address , retained in the register indicator. IN1307 should send the
bit of «non-confirmation», in order to complete the reading.
Data Reading Mode of << SLAVE>> Transmitter
acknowledgement
from slave
acknowledgement
from slave
acknowledgement
from slave
acknowledgement
from master
S SLAVE_ADDRESS 0 A WORD_ADDRESS A S SLAVE_ADDRESS 1 A
R/W
at this moment master-
transmitter becomes
master receiver and
IN1363 slave-receiver
becomes slave-transmitter
R/W
DATA
A
n byte
auto increment
memory word address
no acknowledgement
from master
DATA
1P
last byte
auto increment
memory word
address
Master reads after setting word address (write word address ; read data )
<Slave Address>
<Data (n)> <Data (n+1)> <Data (n+2)> <Data (n+X)>
ss 11110011000000 11 AA XXXXXXXXXXXXXX AA XXXXXXXXXXXXXXXX AA XXXXXXXXXXXXXXXX AA XXXXXXXXXXXXXXXX AA PP
S - START
A - ACKNOWLEDGE
P - STOP
A - NOT ACKNOWLEDGE
DATA TRANSFERRED ( X+1 BYTES + ACKNOWLEDGE) :
LAST DATA BYTE IS FOLLOWED BY A NOT ACKNOWLEDGE( A ) SIGNAL
*R/W - READ/WRITE OR DIRECTION BIT ADDRESS = D1h
Data reading mode of «slave» transmitter
12 2013, December, Ver.04

12 Page





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