CHAPTER 9. IEEE-1284 PARALLEL PORT INTERFACE
The ZT 8905 supports an IEEE-1284 compatible printer port interface, available through the Multi-I/O
connector (J5).
The printer port can be configured in Normal (compatibility), Extended, EPP, or ECP modes through
screen 1 of the BIOS SETUP utility (discussed in the section "BIOS SETUP Overview" in
Appendix A).
The ZT 90206 cable assembly allows the on-board LPT1 channel to interface directly to 25-pin D-
Shell parallel port devices, as used in PC applications. The on-board port may be disabled to allow
use of STD 32 based parallel interfaces.
PARALLEL PORT CONFIGURATION OPTIONS
The different modes for the printer port are described below. Details for the parallel port on the
ZT 8905 are discussed in the following topics.
Parallel Port Mode
Description
Max. Data Rate
Normal
(compatibility)
(Default)
Uni-directional data configuration. The original PC-
AT Mode. Also known as "nibble mode" because the
four status bits in the cable are used for feedback
from devices such as tape back-up units (when
restoring data from a tape). Software based protocol.
50-150 kbps
Extended
Bi-directional data transfer capability. Similar to
Normal mode, but allows 8-bit data in both directions.
Faster for interfaces needing to supply data to the
computer (e.g., scanners, tape back-up). Software
based protocol.
50-150 kbps
EPP
Enhanced Parallel Port. Hardware based
handshaking of the data transfers provide single I/O
instruction data transfers in read and write
operations. Register superset of Normal/Extended
modes.
500 Kbps-2 Mbps
ECP
IEEE-1284 Extended Capability Port. Similar to EPP,
but register set is strictly defined. Adds FIFO's for
read/write operations. ECP devices require IEEE-
1284 compliant cabling and buffers. The ZT 8905
supplies compliant buffers - cabling is available from
other sources.
500 Kbps-2 Mbps
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Содержание ZT 8905
Страница 13: ...Contents Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 15: ...Tables Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 163: ...Index xxxvi Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 164: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...