Intermec ED40 - Example

Chapter 5 — Firmware Download
60 ED40 Decode Board Integration Guide
Example
ACK Protocol Transmission Example
Transmission from the host to the imager
• A: The host transmits a byte to the imager without using any protocol.
Transmission from the imager to the host
• B-1: The imager transmits the first byte.
• B-2: The host transmits the acknowledge (ACK = 0x06).
• B-3: The imager transmits the next byte.
• B-4: The host transmits the acknowledge (ACK = 0x06).
ACK (0x06)
imager TXD
to host
RXD
ACK (0x06)
Host TXD
to imager
RXD
byte
byte
byte (no
protocol)
A B-2
B-1 B-3
B-4