CDP1878C

The CDP1878C is a dual counter-timer consisting of two 16- bit programmable down counters that are independently controlled by separate control registers. The value in the registers determine the mode of operation and control functions. Counters and registers are directly addressable in memory space by any general industry type microprocessors, in addition to input/output mapping with the CDP1800 series microprocessors.

Each counter-timer can be configured in five modes with the additional flexibility of gate-level control. The control registers in addition to mode formatting, allow software start and stop, interrupt enable, and an optional read control that allows a stable readout from the counters. Each countertimer has software control of a common interrupt output with an interrupt status register indicating which counter-timer has timed out.

In addition to the interrupt output, true and complemented outputs are provided for each counter-timer for control of peripheral devices.

This type is supplied in 28-lead dual-in-line ceramic packages (D suffix), and 28-lead dual-in-line plastic packages (E suffix).