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UPD8279C-5

PROGRAMMABLE KEYBOARD DISPLAY INTERFACE

Partnumber Manufacturer Quantity Availability
UPD8279C-5,UPD8279C5 1013 In Stock

Description and Introduction

PROGRAMMABLE KEYBOARD DISPLAY INTERFACE The UPD8279C-5 is a programmable keyboard/display interface chip manufactured by NEC (now part of Renesas Electronics). Below are its key specifications, descriptions, and features:

### **Manufacturer:**  
- NEC (Renesas Electronics)  

### **Specifications:**  
- **Type:** Programmable Keyboard/Display Interface  
- **Operating Voltage:** 5V  
- **Package:** 40-pin DIP (Dual In-line Package)  
- **Clock Frequency:** Up to 3 MHz  
- **Display Modes:**  
  - 8 or 16-character display  
  - Right or left entry  
  - Scanned display mode  
- **Keyboard Modes:**  
  - Scanned keyboard with 2-key lockout or N-key rollover  
  - Sensor matrix mode  
- **Interrupt Output:** Supports interrupt-driven operation  
- **FIFO (First-In-First-Out) Buffer:** 8-byte for keyboard data  

### **Descriptions:**  
- Designed to interface between a microprocessor and a keyboard/display unit.  
- Reduces CPU overhead by handling keyboard scanning and display refreshing.  
- Supports multiplexed displays (LED, 7-segment, etc.).  

### **Features:**  
- **Programmable Scan Timing:** Adjustable scan rate for keyboards and displays.  
- **Auto-Increment Mode:** Simplifies display updates.  
- **Debounce Circuitry:** Built-in debounce for keyboard inputs.  
- **Compatibility:** Works with 8-bit microprocessors (e.g., Intel 8085, Z80).  
- **Standalone Operation:** Can function independently with minimal CPU intervention.  

This information is based solely on the manufacturer's datasheet and technical documentation.

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