Compuprint 10200 Programmer Manual - Manual (Page 212)

Interfaces
208
O O p p e e r r a a t t i i n n g g P P h h a a s s e e s s
The link protocol is mainly based on the following three phases:
•
Negotiation Phase
This phase is activated always by the host, only when in compatibility mode, and defines:
- whether a bidirectional link protocol can be established.
- the handshaking mode as well as the communications mode to be used.
- the device identification, if supported.
•
Communication Phase
This phase is based on well defined handshaking rules which depend upon the selected link
mode.
•
Termination Phase
This phase is initiated by the host and returns the interface to the compatibility mode.