— Frequency counter is main part of the instrumentation system for QCM sensor. Precision and stability of the frequency counter together with the compactness of the frequency counter are crucial factors in development of frequency counter for QCM sensor. CPLD is one of the good choice to be used as a core device to develop frequency counter. The design of the CPLD to be used as a frequency counter can be easily implemented as the availability of CPLD big amount of macrocells is existed. However, careful system design is also needed to optimize the used of the CPLD resources. In the development of CPLD as frequency counter, data transfer from CPLD to microcontroller plays a significant role to the resource usage. In the use of Xilinx XC95108 as 26 bit dual frequency counter, data transfer with 4 bit data width is the most appropriate one to be implemented. The developed frequency counter shows a high accuracy, precision and stability. The developed frequency counter has a 1 Hz precision and stability.
— QCM sensor, frequency counter, CPLD .
S. P. Sakti is with Department of Physics, Laboratory of Instrumentation and Measurement, Brawijaya University, Malang, Indonesia (e-mail: firstname.lastname@example.org).
Cite: Setyawan P. Sakti, " Dual Channel High Precision 26 Bit Frequency Counter Using CPLD XC95108XL for QCM Sensor System," International Journal of Information and Electronics Engineering vol. 4, no. 3, pp. 239-243, 2014.