ICM7170
features
, the ICM7170 can be easily interfaced to any available microprocessor.
The ICM7170 generates two types of interrupts, periodic and alarm. The periodic interrupt (100Hz, 10Hz, etc.) can be programmed by the internal interrupt control register to provide 6 different output signals. The alarm interrupt is set by loading an on-chip 51-bit RAM that activates an interrupt output through a parator. The alarm interrupt occurs when the real time counter and alarm RAM time are equal. A status register is available to indicate the interrupt source.
An on-chip Power Down Detector eliminates the need for external ponents to support the battery back-up function. When a power down or power failure occurs, internal logic switches the on-chip counters to battery back-up operation. Read/write functions bee disabled and operation is limited to time-keeping and interrupt generation, resulting in low power consumption.
Internal latches prevent clock roll-over during a read cycle. Counter data is...
