Post-class 10/23

14 files changed, 90 insertions, 0 deletions

diff --git a/13.md b/13.md
index 7c9cdf9..49dd7e3 100644
--- a/13.md
+++ b/13.md
@@ -98,3 +98,7 @@
 	- Like taking a picture and the subject moves
 
 ![diagram](13.10.png)
+
+---
+
+[Sequential design using flip-flops ->](14.md)
diff --git a/14.1.md b/14.1.md
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/14.1.md
diff --git a/14.1.png b/14.1.png
new file mode 100644
index 0000000..97e39a1
--- /dev/null
+++ b/14.1.png
diff --git a/14.10.png b/14.10.png
new file mode 100644
index 0000000..a89f8d0
--- /dev/null
+++ b/14.10.png
diff --git a/14.11.png b/14.11.png
new file mode 100644
index 0000000..826b0b6
--- /dev/null
+++ b/14.11.png
diff --git a/14.2.png b/14.2.png
new file mode 100644
index 0000000..0978dd8
--- /dev/null
+++ b/14.2.png
diff --git a/14.3.png b/14.3.png
new file mode 100644
index 0000000..0ec69fc
--- /dev/null
+++ b/14.3.png
diff --git a/14.4.png b/14.4.png
new file mode 100644
index 0000000..ab84a5c
--- /dev/null
+++ b/14.4.png
diff --git a/14.5.png b/14.5.png
new file mode 100644
index 0000000..0c0235e
--- /dev/null
+++ b/14.5.png
diff --git a/14.6.png b/14.6.png
new file mode 100644
index 0000000..62d5b90
--- /dev/null
+++ b/14.6.png
diff --git a/14.7.png b/14.7.png
new file mode 100644
index 0000000..396e9e8
--- /dev/null
+++ b/14.7.png
diff --git a/14.8.png b/14.8.png
new file mode 100644
index 0000000..0078001
--- /dev/null
+++ b/14.8.png
diff --git a/14.9.png b/14.9.png
new file mode 100644
index 0000000..5b8f3da
--- /dev/null
+++ b/14.9.png
diff --git a/14.md b/14.md
new file mode 100644
index 0000000..04916f8
--- /dev/null
+++ b/14.md
@@ -0,0 +1,86 @@
+[\<- Flip-flops](13.md)
+
+# Sequential design using flip-flops
+
+## Concepts for sequential design
+
+### Picturing a sequence
+
+![diagram](14.1.png)
+
+### Sequential Design Concepts
+
+- The time from one rising edge of the clock to the next is called a cycle
+- With positive edge-triggered flip-flops, the output can only change at the rising edge of the clock
+	- The flop output (Q) is in a stable "state" for an entire cycle
+- The flop changes state depending on what's on the input (D) at the next rising edge of the clock
+
+### Using these concepts
+
+- Time (past, present. future) is viewed in terms of cycles
+- Inputs can change over time
+	- What matters is the input values "now"
+	- "Now: is the current cycle
+- The next state value, D, is a function of the current state, Q, and the current inputs to the circuit
+
+![diagram](14.2.png)
+
+---
+
+## Circuit that behaves like a T flip-flop
+
+### The T flip-flop
+
+- The flip-flop we have covered thus far is a D flip-flop
+	- It is the most common type of flip-flop, but we will also cover other types of flip-flops
+- A T flip-flop toggles (flips) state if T=1 at the rising edge of the clock
+	- How to implement this behavior with a D flip-flop?
+	- Need to define logic to generate the D input of the flop as a function of the control signal (T) and the flop's current state (Q)
+	- A 2-input truth table
+
+### Circuit that behaves like T ff
+
+- T is the input of the entire circuit
+- Need to define logic to control D input
+
+![diagram](14.3.png)
+
+|TQ|D|
+|--|-|
+|00|0|
+|01|1|
+|10|1|
+|11|0|
+
+### T behavior using D flip-flop
+
+![circuit](14.4.png)
+![truth table](14.5.png)
+![graphical symbol](14.6.png)
+![timing diagram](14.7.png)
+
+---
+
+## JK flip-flop
+
+- A JK flip-flop is a combo of S, R, and T
+	- J sets, K resets, asserting both toggles
+
+|JKQ|D|
+|---|-|
+|000|0|
+|001|1|
+|010|0|
+|011|0|
+|100|1|
+|101|1|
+|110|1|
+|111|0|
+
+![diagram](14.8.png)
+
+### JK behavior using D flip-flop
+
+![circuit](14.9.png)
+![truth table](14.10.png)
+![graphical symbol](14.11.png)