Chapter 4 Flashcards
0
Q
Shift Registers
A
Moves each stored but 1 position.
Inputs: shr (to shift or not to shift) shr_in (what to shift)
Outputs: Q3 Q2 Q1 Q0
1
Q
Registers
A
An n-bit register is a sequential component that can store n-bits.
2
Q
Half Adder
A
Input: A, b
Output: C_o, S
3
Q
Full Adder
A
Input: A, B, C_in
Output: C_out S
4
Q
Carry ripple adder
A
Combine adders by taking co to cin
5
Q
Counter
A
Note how the count rolls over from 1111 to 0000 co = 1
Input: cnt, clk,
Output: tc, c
6
Q
Timer
A
A counter used to measure time
7
Q
Register file
A
You can write one place at a time and read one place at a time. When you write to a port you can’t read it until the next cycle.
Inputs: M bit W_Data, N bit W_Addr, W_en, N bit R_addr, R_en
Outputs: M bit R_Data
Register file is N^2 x M size
