ADDIW — opcode $C0¶
ADDIW Rn,w — Rn ← Rn + w (16 bits, w high byte first); ACC ← the result's high byte; carry ← carry out of bit 15
| Operands | Bytes | Microcode steps |
|---|---|---|
| Rn,addr | 3 | 43 |
One column per microcode step. The control lines are read from the microcode image; the address bus, data bus and registers at the bottom are a model. How to read the diagrams · the instruction set