Method and device for chip to adaptively regulate reading time sequence path

Abstract

The invention provides a method and a device for a chip to adaptively regulate a reading time sequence path. A read control unit memory outputs a read command to a memory unit to carry out a read operation, and meanwhile, the effective indication bit of the original read data is set to be effective after one period of the read command; according to the received read command and a work clock, the memory unit outputs the original read data; the original read data are individually delayed for one period and two periods; according to a judgment result of the frequency of the work clock, an access selection operation is carried out, one path of three inputs, including the original read data, the read data which is delayed for one period and the read data which is delayed for two periods, is selected as output read data; the effective indication bit of the original read data is individually delayed for one period and two periods; and according to the judgment result of the frequency of the work clock, the access selection operation is carried out, one path of three inputs, including the effective indication bit of the original read data and the effective indication bits of the two delayed read data, is selected as the effective indication bit of the output read data.

Description

technical field [0001] The invention relates to a method and a device for chip self-adaptive adjustment of the reading timing path. Background technique [0002] With the development of SOC chip technology, users have higher and higher requirements for chip performance. Since the operating frequency of the chip directly affects the performance, the main frequency of the chip is getting higher and higher. At the same time, due to the complexity of the SRAM storage circuit, and in terms of function, it is required to complete the operation at the next clock beat when the command is received, so when the chip frequency increases rapidly, the reading speed of the SRAM obviously becomes the limit of the chip frequency. Critical Path. At present, the timing path of chip reading is from SRAM command collection to SRAM internal fetching and output to the SRAM port, then to the unit that issues the command, and then to the unit that issues the command to complete data sampling, espe...

AI Technical Summary

Problems solved by technology

At the same time, due to the complexity of the SRAM storage circuit, and in terms of function, it is required to complete the operation at the next clock beat when the command is received, so when the chip frequency increases rapidly, the reading speed of the SRAM obviously becomes the limit of the chip frequency. Critical Path

At present, the timing path of chip reading is from SRAM command collection to SRAM internal fetching and output to the SRAM port, then to the unit that issues the command, and then to the unit that issues the command to complete data sampling, especially when there are many modules mounted on the bus, SRAM The data path back to the originator of the command will be very long and cause a large delay

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