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PDF IN1356 Data sheet ( Hoja de datos )
| Número de pieza | IN1356 | |
| Descripción | CMOS IC OF REAL TIME WATCH | |
| Fabricantes | Integral | |
| Logotipo |  |
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IN1356
CMOS IC OF REAL TIME WATCH WITH SERIAL INTERFACE
Microcircuit IN1356 is essentially the binary-decimal watch with calendar, has the additional 56
bytes of the nonvolatile static memory and possesses the low power consumption. Addresses and data
are transferred in series via the double wire bi-directional bus. The microcircuit is intended for count of
the current time in hours, minutes and seconds, count of the week days, date, month and year. The last
day of the month is automatically adjusted for the months, fewer, than 31 days, including correction for
the leap year. The watch functions in the 24-hour mode. The microcircuit IN1356 has the built-in power
supply control circuit, which detects the supply disruption and automatically switches the device to the
battery mode. The microcircuit IN1356 has the facility for the run accuracy calibration.
Functions and Features
Count of seconds, minutes, hours, week days, date, months and years with consideration of the
leap years;
56 bytes of the nonvolatile memory for the data storage;
double-wire serial interface;
automatic supply voltage drop detection and switching diagram;
consumption of less than 500 nА in the backup supply mode with the operating oscillator;
operating temperature range: -40С 85С;
calibration of run accuracy.
Structural Diagram IN1356
I N TEGRAL
1
1 page  
Card of Addresses RTC and ROM
IN1356
Addresses card of the registers RTC (real time clock) and ROM is depicted in the Figure. Regis-
ters of the real time watch has the addresses 00H – 07H. ROM registers have the addresses 08H –
3FH. In the mode of the multibyte access the address 3FH (the end of the ROM address space) passes
over to the address 00H (end of the address space of the registers RTC).
Watch and Calendar
Acquisition of information about the time and date is performed by means of reading the appro-
priate register bytes. Registers of the real time watch are indicated in the figure. When turning the pow-
er supply on the initial status of all registers is not determined. Presetting and initialization of time and
calendar is performed by means of writing the appropriate bytes. Information, contained in the registers
of time and calendar, represents itself the binary-decimal code.
The bit ST (stop bit) of the seconds register (address 0) is the bit of the watch stop. When it is
set to the high level, then the oscillator is turned off.
Bit CEB (century enable bit) controls the bit status CB (century bit) of the watch register (ad-
dress 2). If the bit CEB is preset to the high level, then switching of the bit CB occurs from the high lev-
el to the low level or from the low level to the high level (it is determined by the initial status) each 100
years. if the bit CEB is preset to the low level, then switching of the bit CB is blocked, and it is in the ini-
tial status.
IN1356 operates in the 24-hour mode.
With the next emergence of the status START at the input SDA writing occurs of the current
time from the counters to the appropriate registers (with the primary emergence of the status START
relative to supply activation of the microcircuit writing of the current time is unavailable). The data about
time from these registers are read in series byte by byte by means of indicating their addresses, and
the watch continues to operate.
I N TEGRAL
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5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet IN1356.PDF ] | |
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