Serial communication protocol controller, byte splitting circuit and 8b10b encoder

Abstract

The invention discloses a serial communication protocol controller which comprises a byte splitting circuit and an 8b10b encoder. The byte splitting circuit receives bus data and transmits the bus data to the 8b10b encoder. Matching of different clock frequencies and different bit widths between the bus data and the 8b10b encoder is completed. The byte splitting circuit comprises FIFO, a controller and a register. The byte splitting circuit extracts 32 bit bus date bytes 0, 1, 2 and 3 to form source data words 1 and bytes 5, 6 and 7 to form source data words 2, 4-beat-8-bit output data are obtained and then are written into the FIFO in sequence, then the data are read into the register under the effect of the controller, and meanwhile the data are transmitted to the encoder input end according to the order from low bytes to high bytes. The invention further provides the byte splitting circuit and the 8b10b encoder used in the serial communication protocol controller. Matching of high-speed serial communication protocol emitting end data bandwidth is effectively achieved.

Description

technical field [0001] The present invention relates to the technical field of microelectronics, in particular to a high-speed serial communication protocol controller circuit, in particular to a byte splitting circuit and an 8b10b encoder. Background technique [0002] In the traditional parallel data transmission mode, the data transmission mode generally adopts a special data bus and a clock line for synchronous transmission. The bandwidth limitation of the traditional parallel bus can no longer meet the astonishing demands of the development of the hardware subsystem speed and the increasing data throughput, which is mainly manifested in the following two aspects: As the bus frequency rises, it will affect the connection to the bus at the same frequency. Therefore, even if the bus clock frequency is increased, the bus bandwidth cannot be significantly improved; although the bandwidth can be increased by increasing the number of parallel channels, the synchronous transmis...

AI Technical Summary

Problems solved by technology

[0007] There are two commonly used encoding circuit design methods: one is to store the corresponding rules of 256 data codes and 12 function codes in memory, and the encoding process is divided into two parts: mapping and polarity selection. This method will increase the size of the chip. The area and power consumption are limited by the speed of the lookup table and the process

Images