Synchronous serial interface device

Abstract

The SYNC serial interface unit is slave unit of AMBA APB bus. The interface unit is composed of some slave module including AMBA APB bus interface module, register set module, transmitting buffer area module, receiving buffer area module, and send receive control module. Through main part configured register mode, slave unit of AMBA APB bus implements transmission of data stream according to protocols: Motorola SPI, Texas Instruments SSI, National Semiconductor Microwire, and Philips I2S. Since I2S circuit is added to the send receive control module, the multifunctional SYNC serial interface unit can be in use for transmitting and receiving audio data stream in I2S protocol. The invention raises usage of pins of chip, system performance and flexibility, and wide application range.

Description

technical field [0001] The invention relates to a synchronous serial interface device, in particular a synchronous serial interface device based on AMBA APB bus. Background technique [0002] With the maturity of deep submicron process technology, the scale of integrated circuit chips is getting larger and larger. Digital IC has developed from a timing-driven design method to an IP multiplexing-based design method, and has been widely used in SOC (System On Chip, System on Chip) design. In SoC design based on IP multiplexing, on-chip bus design is the most critical issue. For this reason, many on-chip bus standards have emerged in the industry. Among them, the AMBA (Advanced Microcontroller Bus Architecture, Advanced Microprocessor Bus Architecture) on-chip bus launched by ARM has been favored by the majority of IP developers and SoC system integrators, and has become a popular industry standard on-chip structure. The AMBA specification It mainly includes AHB (Advanced Hi...

AI Technical Summary

Problems solved by technology

ARM company proposes a multifunctional synchronous serial port interface device, which is controlled by the AMBA APB bus. The AMBA APB master device can configure the registers in the device, and realize the transmission of data streams conforming to various protocols under different register configurations. The sending and receiving control module in the company's multi-functional synchronous serial interface device has an SPI circuit that complies with the Motorola SPI protocol, an SSI circuit that complies with the Texas Instruments SSI protocol, and a Microwire circuit that complies with the NationalSemiconductor Microwire protocol, but it cannot be applied to audio Synchronous serial port protocol for data transmission

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