CDP1871 - CMOS Keyboard Encoder
The CDP1871A is a keyboard encoder designed to directly interface between a CDP1800-series microprocessor and a mechanical keyboard array, providing up to 53 ASCII coded keys and 32 HEX coded keys, as shown in the system diagram (Figure 1).
The keyboard may consist of simple single-pole single-throw
CDP1871 Features
* Directly Interfaces with CDP1800-Series Microprocessor
* Low Power Dissipation
* Three-State Outputs
* Scans and Generates Code for 53 Key ASCII Keyboard Plus 32 HEX Keys (SPST Mechanical Contact Switches)
* Shift, Control, and Alpha Lock Input
* RC-
