SC28L201 Datasheet, PDF (1/110 Pages) NXP Semiconductors – 3.3 V, 5 V UART, 3.125 Mbit/s, with 256-byte FIFO

SC28L201
3.3 V, 5 V UART, 3.125 Mbit/s, with 256-byte FIFO
Rev. 01 — 31 October 2005
Product data sheet
1. General description
The SC28L201 is a high performance UART. Its functional and programming features
closely match but greatly extend those of previous Philips UARTs. Its configuration on
power-up is similar that of the SC26C92. Its differences from the previous Philips UARTs
are: 256-character receiver, 256-character transmit FIFOs, 3.3 V and 5 V compatibility,
8 I/O ports for arbitrating interrupt system and overall faster bus and data speeds and is
fabricated in an advanced 0.5 micron CMOS process.
It is a member of the IMPACT line of data communications parts.
Pin programming will allow the device to operate with either the Motorola or Intel bus
interface by changing the function of some pins (reset is inverted, DACKN, and IACKN
enabled, for example).
The Philips Semiconductors SC28L201 Universal Asynchronous Receiver/Transmitter
(UART) is a single-chip CMOS-LSI communications device that provides a full-duplex
asynchronous receiver/transmitter channel in a single package. It interfaces directly with
microprocessors and may be used in a polled or interrupt driven system. The use of the
Interrupt system provides intelligent interrupt vectors.
The operating mode and data format of the channel may be programmed independently.
Additionally, the receiver and transmitter can select its operating speed as one of
twenty-seven fixed baud rates; a 16× clock derived from one of two programmable
counter/timers, or an external 1× or 16× clock. The baud rate generator and counter/timer
can operate directly from a crystal or from external clock inputs. The ability to
independently program the operating speed of the receiver and transmitter make the
UART particularly attractive for dual-speed channel applications such as clustered
terminal systems and bridges.
Each receiver and transmitter is buffered by 256-character FIFOs to nearly eliminate the
potential of receiver overrun, transmitter underrun and to reduce interrupt overhead in
interrupt driven systems. In addition, a flow control capability (Xon/Xoff and RTS/CTS) is
provided to disable a remote transmitter when the receiver buffer is full.
Also provided on the SC28L201 is a multipurpose 8-bit I/O for the channel. These can be
used as general-purpose I/O ports or can be assigned specific functions (such as clock
inputs or status and interrupt outputs) under program control. Normally they will be used
for modem control and DMA interface. All ports have change of state detectors and input
sections are always active making output signals available to the internal circuits and the
control processor.
The SC28L201 is available in a TSSOP48 package. For other package options, contact
Philips.