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电信号经过V—f转换成频率直接送往Z80—CTc进行计数。在某些场合,比之用电信号经A/D转换后送往Z80—PIO口采样计数,能简化电路。尤适合于一些数据采样、处理的智能仪器。CTc内部有四个八位的减法计数器,每个计数器的满量程、换成十进制数为256个数。当外部来一个脉冲,使其减法
After the electrical signal is converted to frequency by V-f and sent directly to the Z80-CTc for counting. In some cases, compared to the electrical signal sent to the Z80-PIO port after A / D conversion sampling count, can simplify the circuit. Especially suitable for some data sampling, processing smart instruments. CTc internal four eight-bit subtraction counter, full scale of each counter, replaced by a decimal number of 256 numbers. When the external pulse to subtract