Shockburst, Enhanced Shockburst difference

[powerup]

Hi.

What is the difference between SB mode and ESB mode? Is there any performance difference other than auto ACK function?

Thank you.

[ovrebekk]

Hi

The main feature of ESB is the automatic TX/RX switching, used to implement the ACK functionality, but you get some other features as well:

• Automatic retransmit when the ACK is lost
• Dynamic payload length (1-32 bytes)
• ACK with payload
• Dynamic ACK

In terms of performance the only difference is that ESB adds a 9 bit header to the packet, to include the packet length, PID counter and ack/noack bit. This increases the packet overhead slightly.

Otherwise the performance is similar, and if you send a packet without the ACK the the difference is negligible.

Best regards
Torbjørn