PCIe device chip initialization method capable of reducing time delay

Abstract

The invention discloses a PCIe device chip initialization method capable of reducing time delay, which comprises the following steps: 1, judging a fixed initialization mode according to a level valueof an input control pin, and executing the step 2 if fixed initialization is required; otherwise, executing the step 3; 2, reading the fixed initialization content from the hard connection logic, writing the fixed content into a register and a memory area at a fixed address position in the chip, and completing a fixed initialization process; 3, judging a configurable initialization mode: if configurable initialization is needed, executing the step 4; otherwise, ending the initialization process of the PCIe device chip; and 4, reading a configuration command from an erasable memory outside thechip, analyzing and executing the configuration command, and writing corresponding contents into a register and a memory area at corresponding address positions inside the chip to finish a configurable initialization process. The invention has the characteristics of flexibility, quickness and low cost, and can be widely applied to the technical field of information.

Description

technical field [0001] The invention relates to the field of information equipment, in particular to a method for initializing a PCIe equipment chip with reduced delay. Background technique [0002] PCIe has long dominated the field of computer expansion buses. In order to make the PCIe device chip applicable to different host platforms, it is often necessary to initialize the function parameters of the chip after the chip is powered on. These functional parameters include but are not limited to device number, speed class, address space, address mapping, etc. [0003] With the continuous improvement of PCIe speed grades, the analog circuits of PCIe transceivers in PCIe device chips are also becoming more and more complex. In order to ensure that PCIe device chips of different production batches can obtain better electrical performance, and to make PCIe device chips suitable for different host electrical environments, it is often necessary to initialize the circuit paramete...

AI Technical Summary

Problems solved by technology

This initialization method is more flexible, but the initialization speed is slower and the hardware overhead is larger

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