It's the standard symbol for a 2:1 Mux. D goes to the input-select pin. When D is 0 the output is equal to the input on the '0' line and if D is 1 then it's equal to the output on the '1' line.the effect of D on the \10/ thingy is undefined ? does it invert on D=HIGH or D=LOW
moslt likely it's a 2MUX and (i speculate) the \10/ are input addresses ... maybe -- thus D is actually an address input and that very thing generates a conflict ... guessing the right function ?
? a DATA signal going to ADDRESS input line ? . . . which creates up a little confusion as -- what is the "actual" input pin functional assignment ... as the D is also going to C₀ . . . (so D=A=C₀ ... ? which one - if any - is it ...)How does that generate a conflict?
actually not the MUX inputs are not labelled and it has a signal labelled A (?address) on it's data inputs and a signal D (?data) on its address input ... supposedly? ... so . . .I think you are over thinking the problem.
D is not a data line, it is a control signal. This is the classic configuration to implement two's complement subtraction using a binary adder.? a DATA signal going to ADDRESS input line ? . . . which creates up a little confusion as -- what is the "actual" input pin functional assignment ... as the D is also going to C₀ . . . (so D=A=C₀ ... ? which one - if any - is it ...)
Ouch! You gave it away!D is not a data line, it is a control signal. This is the classic configuration to implement two's complement subtraction using a binary adder.
( oh boy ... oh boy ... oh boy)D is not a data line, it is a control signal.
( oh boy ... oh boy ... oh boy)
"obviously" . . . if so comes . . . i've been made hypersensitive to such by all sort of missreferences for pin functions on various datasheets
example :
for https://www.ti.com/lit/ds/symlink/s...3&ref_url=https://www.ti.com/product/SN54S194
it's simulated according to the schematic on the d/s . . . i still don't know how the real chip interprets the S0 S1 inputs ??? (all cool)
View attachment 209057
In the 74 series parts, there *tends* to be common signal names. However, in this case of an adder, look at the 74283 where the inputs are Ax, Bx and the outputs are Sigma or S. These are the names in the TS circuit which is a special adder. I don't know where the "D" input name comes from. So, the names are conventional for the type of function. Of course, if you don't recognize the function, this is not much help! If it is any consolation, two's complement binary arithmetic is complicated. The general topic then includes ones complement and sign + magnitude arithmetic. It all gets fairly advanced and easy to forget.( oh boy ... oh boy ... oh boy)
"obviously" . . . if so comes . . . i've been made hypersensitive to such by all sort of miss references for pin functions on various datasheets
quite common is to miss reference (read "label inadequately") the polarity and function (active edge / active level) of the CLK inputs
http://www.circuitstoday.com/triggering-of-flip-flops
example :
for https://www.ti.com/lit/ds/symlink/s...3&ref_url=https://www.ti.com/product/SN54S194
it's simulated according to the schematic on the d/s . . . i still don't know how the real chip interprets the S0 S1 inputs ??? (all cool)
View attachment 209057
Two's complement is very straight forward. From the definition of Radix-B Complement for an N-digit representation:If it is any consolation, two's complement binary arithmetic is complicated. The general topic then includes ones complement and sign + magnitude arithmetic. It all gets fairly advanced and easy to forget.
by Jake Hertz
by Aaron Carman
by Jake Hertz
by Jake Hertz