OX16PCI954

Features:

·Four 16C950 High performance UART channels
·Arbitrary trigger levels for receiver and transmitter FIFO interrupts and automatic in-band and out-of- band flow control
·8/32-bit Pass-through Local Bus
·IEEE1284 EPP parallel port
· Infra-red (IrDA) receiver and transmitter operation
·Multi-function target PCI controller, fully PCI 2.2 andPCI Power Management 1.0 compliant
·9-bit data framing as well as 5,6,7 and 8
· 12 multi-purpose IO pins which can be configured as interrupt input pins

·UARTs fully software compatible with 16C550-type devices.
· Can be reconfigured using optional non-volatileconfiguration memory (EEPROM)

·Baud rates up to 15Mbps in asynchronous mode and 60Mbps in external 1x clock mode
· Global Interrupt Status and readable FIFO levels tofacilitate implementation of efficient device drivers
·128-byte deep FIFO per transmitter and receiver
·Flexible clock prescaler from 1 to 31.875
· Operation via IO or memory mapping.
·Automated in-band flow control using programmableXon/Xoff in both directions
· Detection of bad data in the receiver FIFO
·5.0V operation
·Automated out-of-band flow control using CTS#/RTS#and/or DSR#/DTR#
·160 TQFP package

Pinout






Specifications

Symbol	Parameter	Min	Max	Units
VDD	DC supply voltage	4.5	5.5	V
TC	Temperature	0	70

Description

The OX16PCI954 is a single chip solution for PCI-based serial and parallel expansion add-in cards. It is a dual function PCI device, where function 0 offers four ultra-high performance OX16C950 UARTs, and function 1 is configurable to offer either an 8 bit Local Bus or a bi- directional parallel port. Serial port cards of OX16PCI954 with up to 8 ports (or with 4 serial ports and a parallel port) can be designed without redefining any device or timing parameters.

Each channel in the OX16PCI954, the fastest available PC-compatible UART, offers data rates up to 15Mbps and 128-deep transmitter and receiver FIFOs. Deep FIFOs reduce CPU overhead and allow utilisation of higher data rates. Each channel is software compatible with the widely used industry-standard 16C550 devices and compatibles as well as the OX16C95x family of high performance UARTs. In addition to increased performance and FIFO size, the UARTs of OX16PCI954 also provide the full set of OX16C95x enhanced features including automated in-band flow control, readable FIFO levels etc.

The efficient 32-bit, 33MHz target-only PCI interface OX16PCI954 is compliant with version 2.2 of the PCI Bus Specification and version 1.0 of PCI Power Management Specification. For applications that do not require the internal parallel port or the local Bus, card designers can assign a Subsystem Vendor ID and a Subsystem ID using 32 input pins. If the UARTs of OX16PCI954 are not required, the Local Bus can be extended from 8-bit operation to a full 32-bit pass-through interface. For full flexibility, all the default register values can be
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overwritten using an optional Microwire serial EEPROM.

To enhance device driver efficiency and reduce interrupt latency, internal UARTs of OX16PCI954 have multi-port features such as shadowed FIFO fill levels, a global interrupt source register and Good-Data Status, readable in four adjacent DWORD registers visible to logical functions in IO space and memory space.

Expansion of serial cards beyond four channels of OX16PCI954 is possible using the 8-bit pass-through Local Bus function. The addressable space can be increased up to 256 bytes, and divided into four chip-select regions. In 32-bit mode the bus can map up to 16kb of Memory address space. This flexible expansion scheme caters for cards with up to 20 serial ports using external 16C950, 16C952, 16C954 or compatible devices, for composite applications such as combined serial and parallel port expansion cards.

The OX16PCI954 also provides an IEEE1284 EPP parallel port which fully supports the existing Centronics interface.

The parallel port of OX16PCI954 can be enabled in place of the Local Bus.

PCI bridge to quad serial and parallel portThe OX16PCI954 is not recommended for new designs. Although there are no current plans to EOL this device, we highly suggest OXuPCI954.Combining PLX's high performance UART and PCI technology, the OX16PCI954 is the ideal connectivity solution for a diverse range of products requiring medium density port expansion including: PC Add-on Cards, Industrial PC, Point of Sale Terminals, Industrial Control and Network Management.This highly integrated device is backed by certified device drivers, for a wide range of operating systems, to deliver ultimate performance with reduced design cycles and accelerated time to market.The OX16PCI954 is a single chip, quad serial and single parallel port or local bus solution for PCI based serial and parallel connectivity applications. The device incorporates PLX's high performance, feature-rich UART technology that combines the industry's fastest baud rates and deepest FIFOs with unrivalled flexibility. OX16PCI954 adds up to a class leading serial connectivity solution.