(China (Mainland))
Product Summary
The CDP1878CE 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 of CDP1878CE 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 of CDP1878CE has software control of a common interrupt output with an interrupt status register indicating which counter-timer has timed out.
Parametrics
CDP1878CE absolute maximum ratings: (1)DC Supply-Voltage Range, (VDD) (All Voltages Referenced to VSS Terminal): -0.5V to +7V; (2)Input Voltage Range, All Inputs: -0.5V to VDD +0.5V; (3)DC Input Current, Any One Input: ±10mA; (4)Device Dissipation Per Output Transistor TA = Full Package Temperature Range (All Package Types): 100mW; (5)Operating Temperature Range (TA) Package Type E: -40℃ to +85℃; (6)Storage Temperature Range (TSTG): -65℃ to +150℃.
Features
CDP1878CE features: (1)Compatible with General Purpose and CDP1800 Series Microprocessor Systems; (2)Two 16-Bit Down Counters and Two 8-Bit Control Registers; (3)5 Modes Including a Versatile Variable-Duty Cycle Mode; (4)Programmable Gate-Level Select; (5)Two-Complemented Output Pins for Each Counter-Timer; (6)Software-Controlled Interrupt Output; (7)Addressable in Memory Space or CDP1800-Series I/O Space.
Diagrams
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