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A Method of Serial Data Clock Domain Crossing Transmission in Geophysical Instruments

Fa-Bao Yan1,2, Jian-Xin Liu1,2, and Yan-Rui Su3
1.School of Geosciences and InfoPhysics, Central South University, Changsha 410083, China
2.Hunan Key Laboratory of Non-ferrous Resources and Geological Hazard Detection, Changsha 410083, China
3.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China

Abstract—Power-consumption reduction, resource optimization and cost reduction are inevitable on geophysical instrument design. We propose a new method for serial data clock domain crossing (CDC) transmission to solve the resource utilization problem of data acquisition interface in geophysical instrument design, combining with the use of digital programmable logic chip FPGA/CPLD. This method changes the usage mode of several simple serial-to-parallel and parallel-to-serial converting registers in original design to convert the CDC serial data instead of the traditional FIFO transfer way, which saves FIFO chips or FIFO modules in programmable logic chip resources fundamentally and can realize the same function as traditional design mode. Through long time verification in practical engineering, the method we proposed can be proved to be with reliability, effectiveness and stable operation.

Index Terms—FPGA/CPLD, Sigma-Delta ADC, Geophysical Instruments, clock domain crossing (CDC), data acquisition, Serial bus, FIFO

Cite: Fa-Bao Yan, Jian-Xin Liu, and Yan-Rui Su, "A Method of Serial Data Clock Domain Crossing Transmission in Geophysical Instruments," Journal of Communications, vol. 10, no. 6, pp. 429-434, 2015. Doi: 10.12720/jcm.10.6.429-434