8-bit mode is your classic parallel interface: every byte of data or command is sent across 8 wires. In 4-bit mode, each byte is split into two nibbles and sent in two times across 4 wires. The datasheet will tell you the whole story.
8-bit mode is your classic parallel interface: every byte of data or command is sent across 8 wires. In 4-bit mode, each byte is split into two nibbles and sent in two times across 4 wires. The datasheet will tell you the whole story.