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UPD8279C from NEC

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UPD8279C

Manufacturer: NEC

Programmable Keyboard / Display Interface

Partnumber Manufacturer Quantity Availability
UPD8279C NEC 5120 In Stock

Description and Introduction

Programmable Keyboard / Display Interface The **UPD8279C** is a programmable keyboard/display interface chip manufactured by **NEC**.  

### **Key Specifications:**  
- **Manufacturer:** NEC (Nippon Electric Company)  
- **Type:** Programmable Keyboard/Display Interface  
- **Function:** Manages keyboard input and display output in microprocessor-based systems.  
- **Compatibility:** Interfaces with 8-bit microprocessors.  

### **Features:**  
- **Keyboard Interface:**  
  - Scans and debounces up to a 64-key keyboard matrix.  
  - Supports 2-key lockout or N-key rollover modes.  
  - Programmable scan timing.  
- **Display Interface:**  
  - Controls up to 16 alphanumeric digits or 128 segment displays.  
  - Supports multiplexed display scanning.  
  - Right or left entry display modes.  
- **Interrupt Output:** Generates an interrupt when a key is pressed.  
- **Programmable Modes:** Configurable for different keyboard and display types.  
- **Internal RAM:** Stores display data and keyboard status.  

### **Applications:**  
- Used in microprocessor-based systems requiring keyboard input and display control.  
- Common in industrial control panels, test equipment, and embedded systems.  

This chip simplifies keyboard and display interfacing in embedded designs by handling scanning, debouncing, and display multiplexing internally.

Application Scenarios & Design Considerations

Programmable Keyboard / Display Interface

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