OX16C954 データシートの表示（PDF） - Unspecified

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OX16C954

High Performance Quad UART with 128-byte FIFOs Intel / Motorola Bus Interface

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OX16C954 rev B

High Performance Quad UART with 128-byte FIFOs

Intel / Motorola Bus Interface

FEATURES

• Four independent full-duplex asynchronous 16C950

high performance UART channels

• 128-byte deep FIFO per transmitter and receiver

• UARTs fully software compatible with industry

standard 16C55x type UARTs

• Pin compatible with TL16C554 and ST16C654

• Baud rates up to 15 Mbps in normal mode and

60Mbps in external 1x clock (isochronous) mode

• Readable FIFO levels

• Flexible clock prescaler from 1 to 31.875

• Automated in-band flow control using programmable

Xon/Xoff characters, in both directions

• Automated out-of-band flow control using CTS#/RTS#

and/or DSR#/DTR#

• Arbitrary trigger levels for receiver and transmitter

FIFO interrupts and automatic in-band and out-of-

band flow control

REV B ENHANCEMENTS

• Readable in-band and out-of-band flow control status

• Programmable special character detection

• Infra-red (IrDA) receiver and transmitter option

• 5, 6, 7, 8 and 9-bits data framing

• Detection of bad data in the receiver FIFO

• Independent channel reset by software

• Transmitter and receiver can be disabled

• Transmitter idle interrupt

• RS-485 buffer enable signals

• Four byte device ID

• Sleep mode (low operating current)

• System clock up to 60 MHz at 5V, 50 MHz at 3.3V

• 5.0 volt or 3.3v operation*

• 68pin PLCC and 80pin TQFP package options.

*Only the 80pin TQFP package supports operation at 5v or 3.3v.

The OX16C954B is an enhanced, backward-compatible revision of the OX16C954 rev A. It uses the newer core as in the

OX16C950 rev B. The chief enhancements are as follows –

• All known errata fixed

• Full TCR range from 4-16

• Enhanced controls for sleep-mode sensitivity, ability to read FCR and Good Data Status

• 3.3V operation with 80 pin TQFP

• Enhanced isochronous clocking options (optional inversions, DTR/DSR)

Hereafter OX16C954 rev B is simply referred to as OX16C954.

Oxford Semiconductor Ltd.

25 Milton Park, Abingdon, Oxon, OX14 4SH, UK

Tel: +44 (0)1235 824900 Fax: +44 (0)1235 821141

© Oxford Semiconductor 2001

OX16C954 rev B Data Sheet R1.0 – November 2001

Part Nos. OX16C954-PCC60-B / OX16C954_TQC60_B

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