Advertisement
IC127C
8/28/2007
724-746-5500
#19424
Technically Speaking
Continued...
Flow control.
Unlike a 16550 UART, which is a "dumb" device, the
16650 UART is capable of detecting flow-control signals
without intervention from the CPU.
In fact, the only thing the CPU ever sees from the 16650
UART is a request to load the buffer or to retrieve data.
No transmission retry is ever required. Overrun errors are
virtually impossible.
EPP and ECP.
The requirements of high-speed peripheral devices such
as printers have led to the development of enhanced parallel
standards known as EPP and ECP.
EPP, which stands for Enhanced Parallel Port, increases
parallel port throughput to the same speed as the ISA bus.
TECH SPECS
Card Type — IC127C, IC129C: ISA;
IC126C, IC128C-R3, IC145C–IC146C: PCI
Speed — IC126C: 7.2 MBps;
IC127C, IC128C-R3, IC145C: 460.8 kbps;
IC129C, IC146C: 2.5 MBps
Operating Systems Supported — Windows
®
95/98, Windows NT
(call Tech Support about Windows 2000)
CE Approval — IC127C, IC128C-R3, IC129C
Connectors — IC126C, IC129C: (1) DB25;
IC127C, IC145C: (1) DB9;
IC128C-R3: (2) DB9;
IC146C: (2) DB25
Power — From the PC bus
Size —
3
⁄
card
4
blackbox.com
EPP ports are also 8-bit bidirectional, making them ideal for
high-speed peripherals such as parallel port modems.
ECC, or Enhanced Capabilities Port, is a refinement of EPP.
Although ECP ports operate at the same speeds as EPP, their
design gives you even faster data transfer rates. ECP ports
have DMA (Direct Memory Access) capability, so data can
be channeled directly to memory, bypassing the CPU—an
important feature given the overhead demands of modern
multitasking operating systems.
The IC129A adapter, for example, is compatible with EPP
and ECP and is also backward compatible with 4- and 8-bit
parallel standards.
Item
PC Plus Adapters
HS Parallel PCI
RS-232 Serial ISA
Dual Serial PCI
Enhanced Parallel ISA
®
RS-232 HS Serial PCI
Dual Parallel PCI
For serial modem connections...
AT
®
Modem Cable, Premium, 9-Conductor,
DB9 Female/DB25 Male
For parallel printer connections...
Enhanced Parallel Port Cable,
DB25 Male/Centronics
®
For the RS-232 HS Serial PCI...
AT Modem Cable, Standard, 9-Conductor,
DB9 Female/DB25 Male
For the Dual Parallel PCI...
Parallel Printer Cable, Centronics
Male/DB25 Male
Code
IC126C
IC127C
IC128C-R3
IC129C
IC145C
IC146C
EVMBMC
Male
EQN202
BC00301
EYN600
3 of 3
Advertisement
