High-Speed Parallel Interface Design: Principles, Limitations, and Practice
1. What Is a Parallel Interface? A parallel interface transmits multiple bits simultaneously across multiple data lines. As shown below, there are 8 to 32 or more data wires (D[7:0], D[31:0], etc.) between transmitter and receiver, along with a shared clock and control signals such as VALID and READY. ┌─────────────┐ ┌─────────────┐ │ Transmitter │ D[7:0] │ Receiver │ │ ├────────►│ │ │ │ CLK │ │ │ ├────────►│ │ │ │ VALID │ │ │ ├────────►│ │ └─────────────┘ └─────────────┘ Parallel Bus — 8 data bits transferred simultaneously each clock cycle ■ CLK ■ D[7:0] data ■ VALID Advantages: ...