SC16C754BIA68

5 V ， 3.3 V和2.5 V四UART ， 5兆比特/秒（最大） ，64字节FIFO 5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s max. with 64-byte FIFOs

Overview

The SC16C754B is a quad Universal Asynchronous Receiver/Transmitter UART with 64-byte FIFOs, automatic hardware/software flow control, and data rates up to 5 Mbit/s 3.3 V and 5 V. The SC16C754B offers enhanced features. It has a Transmission Control Register TCR that stores receiver FIFO threshold levels to start/stop transmission during hardware and software flow control. With the FIFO Ready FIFO Rdy register, the software gets the status of TXRDY/RXRDYfor all four ports in one access. On-chip status registers provide the user with error indications, operational status, and modem interface control. System interrupts may be tailored to meet user requirements. An internal loopback capability allows on-board diagnostics.

The UART transmits data, sent to it over the peripheral 8-bit bus, on the TX signal and receives characters on the RX signal. Characters can be programmed to be 5, 6, 7, or 8 bits. The UART has a 64-byte receive FIFO and transmit FIFO and can be programmed to interrupt at different trigger levels. The UART generates its own desired baud rate based upon a programmable divisor and its input clock. It can transmit even, odd, or no parity and 1, 1.5, or 2 stop bits. The receiver can detect break, idle, or framing errors, FIFO overflow, and parity errors. The transmitter can detect FIFO underflow. The UART also contains a software interface for modem control operations, and has software flow control and hardware flow control capabilities.

The SC16C754B is available in plastic LQFP64, LQFP80 and PLCC68 packages.

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## Features

* 4 channel UART

* 5 V, 3.3 V and 2.5 V operation

* Pin compatible with SC16C654IA68, TL16C754, and SC16C554IA68 with additional enhancements, and software compatible with TL16C754

* Up to 5 Mbit/s data rate at 3.3 V and 5 V; at 2.5 V maximum data rate is 3 Mbit/s

* 5 V tolerant on input only pins

* 64-byte transmit FIFO

* 64-byte receive FIFO with error flags

* Industrial temperature range -40 Cel to +85 Cel

* Programmable and selectable transmit and receive FIFO trigger levels for DMA and interrupt generation

* Software Xon/Xoff/hardware RTS/CTS flow control

* Programmable Xon/Xoff characters

* Programmable auto-RTS and auto-CTS

* Optional data flow resume by Xon any character

* DMA signalling capability for both received and transmitted data

* Supports 5 V, 3.3 V and 2.5 V operation

* Software selectable baud rate generator

* Prescaler provides additional divide-by-4 function

* Fast data bus access time

* Programmable Sleep mode

* Programmable serial interface characteristics

* 5, 6, 7, or 8-bit characters

* Even, odd, or no-parity bit generation and detection

* 1, 1.5, or 2 stop bit generation

* False start bit detection

* Complete status reporting capabilities in both normal and Sleep mode

* Line break generation and detection

* Internal test and loopback capabilities

* Fully prioritized interrupt system controls

* Modem control functions CTS, RTS, DSR, DTR, RI, and CD

* Sleep mode

## Features