OX16C950 rev B
High Performance UART
with 128 byte FIFOs
F
EATURES
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Single full-duplex asynchronous channel
128-byte deep transmitter / receiver FIFO
Fully software compatible with industry standard
16C550 type UARTs
Pin compatible with TL16C550B/C, ST16C650 and
TL16C750
IBM PC/AT compatible
Baud rates up to 15 Mbps in normal mode and
60Mbps in external 1x clock mode
Readable FIFO levels
Flexible clock prescaler from 1 to 31.875
Isochronous mode using external 1x baud rate clock
up to 60Mbps
9-bit data framing as well as 5,6,7 and 8
Detection of bad data in the receiver FIFO
Automated in-band flow control using programmable
Xon/Xoff characters
Transmitter and receiver can be disabled
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Automated out-of-band flow control using CTS# / RTS#
and DSR# / DTR#
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Readable in-band and out-of-band flow control status
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Programmable special character detection
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Arbitrary trigger levels for receiver and transmitter FIFO
interrupts and automatic in-band and out-of-band flow
control
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Transmitter idle interrupt (shift register and FIFO both
empty)
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Optional Infra-red (IrDA) receiver and transmitter
operation
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RS-485 buffer enable signals
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Software channel reset
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Four byte device ID
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Sleep mode (low operating current)
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System clock up to 60 MHz (at 5V), 50 MHz at 3.3V
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44 PLCC and 48 TQFP packages
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5 volts operation (PLCC), 3.3/ 5V operation TQFP
R
EV
B E
NHANCEMENTS
The OX16C950B is an enhanced, fully backward-compatible revision of the OX16C950 rev A. The chief enhancements are as
follows –
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All known errata fixed
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Enhanced features first offered in OX16PCI954 added – these include controls for sleep-mode sensitivity, ability to
read FCR and Good Data Status
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3V operation possible with 48 pin TQFP
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Enhanced isochronous clocking options (optional inversions)
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Enhanced system clock selection options (use of CLKSEL as a clock input)
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Readable TxRdy, RxRdy status and forcing TxRdy or RxRdy inactive
Hereafter OX16C950 rev B is simply referred to as OX16C950.
Oxford Semiconductor Ltd.
25 Milton Park, Abingdon, Oxon, OX14 4SH, UK
Tel: +44 (0)1235 824900 Fax: +44 (0)1235 821141
Oxford Semiconductor 2001
OX16C950 rev B Datasheet R1.2 – May 2001
Part No. OX16C950-PCC60-B