Timer Control Peripheral (TCP)

The DP8570A is intended for use in Microprocessor based systems where information is required for multi-tasking, data logging or general time of day/date information. This device is implemented in low voltage silicon Gate microCMOS technology to provide low standby power in battery back-up environments. The circuit's architecture is such that it looks like a contiguous block of memory or I/O ports. The address space is organized as 2 software selectable pages of 32 bytes. This includes the Control Registers the Clock Counters the Alarm Compare RAM, the Timers and their data RAM, and the Time Save RAM. Any of the RAM locations that are not being used for their intended purpose may be used as general purpose CMOS RAM.
Time and date are maintained from 1/100 of a second to year and leap year in a BCD format, 12 or 24 hour modes. Day of week, day of month and day of year Counters are provided. Time is controlled by an on-chip crystal Oscillator requiring only the addition of the crystal and two capacitors. The choice of crystal frequency is program selectable.
Two independent multifunction 10 MHz 16-bit Timers are provided. These Timers operate in four modes. Each has its own prescaler and CAN select any of 8 possible Clock inputs. Thus, by programming the input Clocks and the Timer Counter values a very wide range of Timing durations CAN be achieved. The range is from about 400 ns (4.915 MHz oscillator) to 65,535 seconds (18 hrs., 12 min.).
Power failure Logic and control functions have been integrated on chip. This Logic is used by the TCP to issue a power fail
interrupt, and lock out the ?p Interface The time power fails may be logged into RAM automatically when VBB > VCC. Additionally, two supply pins are provided. When VBB > VCC, internal circuitry will automatically Switch from the main supply to the battery supply. Status bits are provided to indicate initial application of battery power, system power, and low battery detect.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
DP8570AV/NOPB Texas Instruments IC 2 TIMER(S), REAL TIME CLOCK, PQCC28, PLASTIC, LCC-28, Timer or RTC
DP8570AVX/NOPB Texas Instruments IC 2 TIMER(S), REAL TIME CLOCK, PQCC28, PLASTIC, LCC-28, Timer or RTC
DP8570AVX Texas Instruments IC 2 TIMER(S), REAL TIME CLOCK, PQCC28, PLASTIC, LCC-28, Timer or RTC
DP8570AV Texas Instruments IC 2 TIMER(S), REAL TIME CLOCK, PQCC28, PLASTIC, LCC-28, Timer or RTC
DP8570A 's PackagesDP8570A 's pdf datasheet
DP8570AV PLCC
DP8570AVX PLCC

DP8570A pdf datasheet download


DP8570A Pinout, Pinouts
DP8570A pinout,Pin out
This is one package pinout of DP8570A,If you need more pinouts please download DP8570A's pdf datasheet.

DP8570A Application circuits
DP8570A circuits
This is one application circuit of DP8570A,If you need more circuits,please download DP8570A's pdf datasheet.


Related Electronics Part Number

Related Keywords:

DP8570A Pb-Free DP8570A Cross Reference DP8570A Schematic DP8570A Distributor
DP8570A Application Notes DP8570A RoHS DP8570A Circuits DP8570A footprint