The CD40110 is currently in the subtraction count state, but the digital tube occasionally adds a few times. What is the most possible reason?
A: The input pulse is connected to the CT
B: The addition count pin is not connected to a fixed level
C: The subtraction counting pin is not connected
D: The voltage is unstable
A: The input pulse is connected to the CT
B: The addition count pin is not connected to a fixed level
C: The subtraction counting pin is not connected
D: The voltage is unstable
举一反三
- CD40110 needs to be counted by cascade subtraction, that is multiple chips and the digital tube display multiple bits, so which pin of the ten bit chip needs to be output to the CPd of the lowest digit of CD40110? A: 3 B: 12 C: 11 D: 10 E: 9
- When the 74LS90 chip QA is connected to INPUT B and the counting pulse is input from INPUT A, which counting system does the chip employ? () A: Binary system B: Quinary system C: Decimal system D: Septenary system
- 数字减影血管造影基于（ ）运算What operation does digital subtraction angiography use A: 加法Addition B: 减法Subtraction C: 乘法Multiplication D: 除法division
- The counting mode is to count the external pulse of P0 port
- Theacronym GAAP is most closely connected with: