(3) 0/1 of the above table represent the validity of the signal. The 0-bit terminal input is invalid. 1 
is the terminal input valid. 
2. Terminal effectiveness description 
The following table takes /SPD-D as an example, /SPD-A, /SPD-B signals are the same. 
Signal/SPD-D terminal input status 
Signal/SPD-D terminal 
logic 
No need external terminal input   
SI□ terminal no signal input 
SI□ terminal has signal input   
No need external terminal input 
SI□ terminal has signal input 
SI□ terminal no signal input 
 
3. Running example 
 
 
Speed up down is decided by