System clock implementing method, system and time clock function board

Abstract

The invention provides a realization method, a system and a clock function board for a system clock, wherein the realization method is as follows: by a first output enable clock terminal, the clock function board outputs a system clock signal to a first input clock terminal of at least one advanced mezzanine card (AMC); or the first output enable clock terminal is set in a high resistance state, by a second output enable clock terminal, the clock function board outputs the system clock signal to a second input clock terminal on at least one AMC; or the second output enable clock terminal is set in a high resistance state; when the two output enable clock terminals simultaneously output the system clocks, two sets of system clocks can be provided for the AMC; and when one of output enable clock terminals is set in a high resistance state, one set of the clock system can be provided for the AMC, thereby, one set or more than one set of system clock can be flexibly provided for the AMC.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for realizing a system clock, a system and a clock function board. Background technique [0002] Small physical size of the telecommunications computing architecture (MicroTCA, Micro Telecommunications Computing Architecture) is a peripheral component expansion port (PCI) Industrial Computer Manufacturers Association (PICMG, PCI Industrial Computer Manufacturers Group) developed platform specifications, MicroTCA uses advanced mezzanine card (AMC, Advanced Mezzanine Card) to build a small-capacity and low-cost modular communication platform, which is mainly used in small telecommunication equipment such as central computer rooms or enterprise-level communication equipment. The current standard specification version is PICMG MicroTCA.0R1.0 version. [0003] figure 1 It is a composition structure diagram of the MicroTCA system in the prior art, such as figure 1 As shown, in a M...

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Problems solved by technology

[0010] Since clock ports TCLKA and TCLKB on each AMC perform clock signal interaction with MCH1, clock ports TCLKC and TCLKD perform clock signal interaction with MCH 2, and MCH 1 and MCH 2 serve as active and standby clock function boards respectively. Therefore, in the prior art The implementation method of this system clock can only provide one set of system clocks for AMC, but in some application scenarios, it may be required that the clock function board can provide more than one set of system clocks for AMC. At this time, the prior art Therefore, a method that can flexibly provide one or more sets of system clocks is needed

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