Programmable crystal oscillator real-time configuration and monitoring method for FPGA
A crystal oscillator and clock technology, which is applied in the field of real-time configuration and monitoring of programmable crystal oscillators, can solve the problems of waste of hardware resources, improvement, unfavorable product integration, etc., and achieve the effect of improving product integration and reducing hardware costs
Pending Publication Date: 2022-08-05
SHANGHAI AEROSPACE ELECTRONICS CO LTD
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Problems solved by technology
This not only causes a waste of hardware resources, but also is not conducive to the improvement of product integration.
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[0015] The following will combine Figure 1 to Figure 3 The real-time configuration and monitoring method of the programmable crystal oscillator for FPGA of the present invention is further described in detail.
[0016] The real-time configuration and monitoring method of the programmable crystal oscillator used in the FPGA of the present invention utilizes two special signals inside the FPGA: the CFGMCLK (Configuration Master Clock) signal and the EOS (End Of Startup) signal, the CFGMCLK signal is used as the working clock, and the EOS signal is used as the working clock. As a reset signal, it provides clock and reset for the logic that configures the programmable crystal oscillator. Both the CFGMCLK signal and the EOS signal are provided by the STARTUP primitive function module inside the FPGA.
[0017] The real-time configuration and monitoring method of the programmable crystal oscillator used in the FPGA of the present invention utilizes the existing clock signal and res...
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According to the programmable crystal oscillator real-time configuration and monitoring method for the FPGA, a CFGMCLK signal and an EOS signal in the FPGA are utilized, the CFGMCLK signal serves as a work clock, the EOS signal serves as a reset signal, and clock and reset are provided for logic configuration of the programmable crystal oscillator. According to the real-time configuration and monitoring method of the programmable crystal oscillator for the FPGA, clock and reset are provided for the logic for configuring the programmable crystal oscillator by using the existing clock signal and reset signal in the FPGA, so that an additional crystal oscillator for providing the clock for the logic for configuring the programmable crystal oscillator can be omitted, the FPGA can work normally only by using one programmable crystal oscillator, and the reliability of the FPGA is improved. Therefore, the clock requirements of different products are met, the hardware cost is reduced, and the product integration degree is improved.
Description
technical field [0001] The invention relates to FPGA clock circuit design, in particular to a real-time configuration and monitoring method of a programmable crystal oscillator for FPGA. Background technique [0002] The normal operation of the internal logic circuit of an FPGA (Field-Programmable Gate Array) is almost inseparable from a stable and reliable clock, and different design requirements often require the FPGA to be matched with crystal oscillators of different frequencies. In order to make the hardware platform have better adaptability, FPGA is often matched with programmable crystal oscillator. Programmable crystal oscillator, as the name implies, can be programmed to control the crystal oscillator to output a clock of any frequency within a certain frequency range in order to adapt to different design requirements. [0003] However, the following technical problems will be encountered when the FPGA uses the programmable crystal oscillator as the clock source: ...
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Login to View More IPC IPC(8): G06F1/08G06F1/14
CPCG06F1/08G06F1/14
Inventor 迟东明杨培靖朱敏
Owner SHANGHAI AEROSPACE ELECTRONICS CO LTD