Product category:
Communications ICs (Wired)
News Release from: Oxford Semiconductor | Subject: OXmPCI954
Edited by the Electronicstalk Editorial
Team on 13 June 2003
Chip puts four speedy UARTs on the
PCIbus
The OXmPCI954 integrates four high-performance UART channels, a 3.3V PCI interface and a local bus/IEEE1284 port in a 160 LQFP package.
Handling serial datarates up to 15Mbit/s in asynchronous mode and 60Mbit/s in synchronous mode, the OXmPCI954 integrates four high-performance UART channels, a 3.3V PCI interface and a local bus/IEEE1284 port in a 160 LQFP package A single-chip solution for 3.3V PCI and Mini PCI based serial and parallel addon cards, the OXmPCI954 is a flexible multifunction device
This article was originally published on Electronicstalk on 22 Jul 2008 at 8.00am (UK)
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Function 0 offers the ultrafast quad UART capability.
Function 1 provides either an 8bit local bus or a bidirectional IEEE1284 parallel port supporting SPP, EPP and ECP protocols.
To simplify design-in, each high-speed UART channel is software compatible with industry standard 16C550 devices and Oxford's own OX16C950 UART family.
Expansion cards with more than four channels are also possible using the IC's 8bit pass-through local bus option, which allows chips to be daisychained to create up to 20 serial ports.
Equipped with 128byte deep transmitter and receiver FIFOs, the OXmPCI954 is able to significantly reduce CPU overhead and boost addon card performance.
The PCI interface is fully compliant with PCIbus version 3 and PCI power management version 1.1 specifications.
To enhance device driver efficiency and reduce interrupt latency, the UARTs have multiport features including shadowed FIFO levels, a global interrupt source register and a "good-data" status indicator, easily readable in four adjacent DWORD registers visible to logical functions in I/O and memory space.
Oxford Semiconductor is supporting the OXmPCI954 with software drivers for Windows (98 and above), with Linux drivers available from third party sources.
A PCI card reference design, application notes for setup and utilities for configuration upgrade are also available.
Price competitive with alternative four-channel and many two-channel devices, Oxford Semiconductor's quad UART PCI interface chip is $11.68 in 1000-piece quantities.
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