Compact Disk Player DSP The LC78632RE is a digital signal processor (DSP) chip manufactured by SANYO. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** SANYO
- **Function:** Digital Signal Processor (DSP)
- **Package:** 80-pin QFP (Quad Flat Package)
- **Power Supply Voltage:** 5V (typical)
- **Operating Temperature Range:** -10°C to +70°C
- **Clock Frequency:** 16.9344 MHz (standard for CD/DSP applications)
- **Data Processing:** 16-bit fixed-point DSP architecture
### **Descriptions:**
- The LC78632RE is designed for CD (Compact Disc) and digital audio processing applications.
- It performs EFM (Eight-to-Fourteen Modulation) demodulation, error correction (CIRC), and digital filtering.
- Supports digital servo control for CD mechanisms.
- Includes built-in RAM for data buffering and processing.
### **Features:**
- **EFM Demodulation:** Converts 14-bit EFM signals to 8-bit data.
- **Error Correction:** Uses Cross-Interleave Reed-Solomon Code (CIRC) for data integrity.
- **Digital Filter:** Includes an oversampling digital filter for improved audio quality.
- **Servo Control:** Provides digital servo signal processing for CD spindle and tracking control.
- **Interface:** Supports serial and parallel data output for DAC (Digital-to-Analog Converter) interfacing.
- **Low Power Consumption:** Optimized for efficient operation in CD players and related audio devices.
This chip was commonly used in CD players and digital audio systems in the 1990s and early 2000s.
