8MHz intellegent GPIB controller The UPD7210C is a microprocessor peripheral chip manufactured by NEC (now part of Renesas Electronics). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Manufacturer:**
- **NEC (Now Renesas Electronics)**
### **Specifications:**
1. **Type:** Microprocessor Peripheral (DMA Controller)
2. **Package:** 40-pin DIP (Dual In-line Package)
3. **Technology:** CMOS
4. **Operating Voltage:** 5V
5. **Clock Frequency:** Compatible with 5 MHz systems
6. **Data Bus Width:** 8-bit
7. **DMA Channels:** 4 independent channels
8. **Transfer Modes:**
- Single transfer
- Block transfer
- Demand transfer
- Cascade mode
### **Descriptions:**
- The UPD7210C is a **DMA (Direct Memory Access) controller** designed to offload data transfer tasks from the main CPU.
- It allows high-speed data movement between memory and I/O devices without CPU intervention.
- Commonly used in early microprocessor-based systems (e.g., Z80, 8080, and 8085-based designs).
### **Features:**
1. **Four Independent DMA Channels** – Supports simultaneous data transfers.
2. **Programmable Priority Modes** – Fixed or rotating priority schemes.
3. **Memory-to-Memory Transfer Capability** – Enables fast block moves.
4. **Auto-Reload Mode** – Simplifies repetitive operations.
5. **Cascade Mode** – Allows multiple UPD7210C chips to work together.
6. **Wide Compatibility** – Works with 8-bit microprocessors like Intel 8080/8085 and Zilog Z80.
This information is based on the documented specifications of the UPD7210C. No additional guidance or suggestions are included.
