sorry for my unclear description. yes,basicly,i need a chip which can have the function of programmable output frequence,
normally ,this is implemented by 16 bit programmable timer/counter, since normally,a 8051cpu only have 3 timer/count,
which can't meet my need of 8. so i am seaching for a chip which can implement 8 16bit timer/counter.
for example,if the system clock is 10MHz,then i can get
output frequency range from about 150hz to 10MHz if the timer is 16bit. but i want the 4 freq output can be configured independently,(output signal have different freq)



i don't know if i got my question clearly stated.