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Stylus C40UX/C40SX/C20UX/C20SX Revision A
PRODUCT DESCRIPTION INTERFACE 17
1.4.5 IEEE1284.4 Protocol
The packet protocol described by IEEE1284.4 standard allows a device to carry on
multiple exchanges or conversations which contain data and/or control information
with another device at the same time across a single point-to-point link. The protocol is
not, however, a device control language. It does provide basic transport-level flow
control and multiplexing services. The multiplexed logical channels are independent of
each other and blocking of one has no
effect on the others. The protocol operate over IEEE1284.
- Automatic selection
An initial state is compatible interface and starts IEEE1284.4 communication
when magic strings (IEEE 1284.4 synchronous commands) are received.
- On
An initial state is IEEE1284.4 communication and data that received it by the
time it is able to take synchronization by magic string (IEEE 1284.4
synchronous commands) is discarded.
- Off
An initial state is compatible interface and never starts IEEE1284.4
communication even if magic strings (IEEE 1284.4 synchronous commands)
are received.
Factory setting is on.(Refer to Appendix H.EEPROM Map 09h)