Posted by Macrocell Anatomy Viewer
Explore the internal architecture of CPLD, EPLD & FPGA macrocells. Visualize AND-OR arrays, product terms, flip-flops & I/O blocks with Macrocell Anatomy Viewer.
MACROCELL ANATOMY LAB :: CPLD Deep Dive
📱 Mobile Optimized • Interactive Code Snippet👆 Swipe tabs left/right to see all sections. Diagrams are scrollable sideways on phone.
WHAT IS A CPLD MACROCELL?
A CPLD has Function Blocks, each with 16 Macrocells. Macrocell = tiny LEGO brick: AND-OR + XOR + MUX + D/T Flip-Flop + Feedback.
Flow: Product Terms (AND) → OR → Optional XOR → MUX → Flip-Flop → Output MUX → Pin or Feedback to GIM.
MACROCELL SIGNAL FLOW
WHY IT MATTERS
COMPLETE BLOCK DIAGRAM - Tap mode:
Mode: REG D-FF
↔️ Scroll diagram sideways with finger to see full path
AND-OR ARRAY CONFIGURATOR
Build Product Terms: - = don't care, 1 = A, 0 = ~A
XOR Gate
XOR with 1 inverts: Y = Sum XOR 1 = ~Sum. Saves product terms! ~ (A & B) needs 2 PTs without XOR, 1 PT with XOR.
MUX
MUX1: Bypass vs FF. MUX2: Registered vs comb vs input to output buffer.
Tri-State & OE
OE=PT. OE=1 drives pin, OE=0 high-Z input. For bidirectional buses.
Feedback to GIM
Q->GIM (registered) or OR->GIM (comb). Any macrocell via GIM. Buried = feedback only, no pin.
INTERACTIVE CONFIGURATOR
Output Mode
Product Terms: 5
On Android: Tap Save TXT → Downloads folder. Or Copy → Paste to notes.
STATUS: Ready - Mobile OptimizedMode: REG D-FF