SC16C650BIBS,151

SC16C650B - 5 V、3.3 V和2.5 V的UART，带有32字节FIFO以及红外IrDA编码器/解码器

Overview

The SC16C650B is a Universal Asynchronous Receiver and Transmitter UART used for serial data communications. Its principal function is to convert parallel data into serial data, and vice versa. The UART can handle serial data rates up to 3 Mbit/s.

The SC16C650B is pin compatible with the ST16C650A and it will power-up to be functionally equivalent to the 16C450. Programming of control registers enables the added features of the SC16C650B. Some of these added features are the 32-byte receive and transmit FIFOs, automatic hardware or software flow control and infrared encoding/decoding. The selectable auto-flow control feature significantly reduces software overload and increases system efficiency while in FIFO mode by automatically controlling serial data flow using RTS output and CTS input signals. The SC16C650B also provides DMA mode data transfers through FIFO trigger levels and the RXRDY and TRXRDY signals. On-board 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 SC16C650B operates at 5 V, 3.3 V and 2.5 V, and the industrial temperature range, and is available in plastic PLCC44, LQFP48, and HVQFN32 packages.

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## Features

* Single channel

* 5 V, 3.3 V and 2.5 V operation

* 5 V tolerant on input only pins1

* Industrial temperature range -40 Cel to +85 Cel

* After reset, all registers are identical to the typical 16C450 register set

* Capable of running with all existing generic 16C450 software

* Pin compatibility with the industry-standard ST16C450/550, TL16C450/550, PC16C450/550. Software compatible with ST16C650.

* Up to 3 Mbit/s transmit/receive operation at 5 V, 2 Mbit/s at 3.3 V, and 1 Mbit/s at 2.5 V

* 32 byte transmit FIFO

* 32 byte receive FIFO with error flags

* Programmable auto-RTS and auto-CTS

* In auto-CTS mode, CTS controls transmitter

* In auto-RTS mode, RX FIFO contents and threshold control RTS

* Automatic software/hardware flow control

* Programmable Xon/Xoff characters

* Software selectable baud rate generator

* Supports IrDA version 1.0 up to 115.2 kbit/s

* Four selectable Receive and Transmit FIFO interrupt trigger levels

* Standard modem interface or infrared IrDA encoder/decoder interface

* Sleep mode

* Standard asynchronous error and framing bits Start, Stop, and Parity Overrun Break

* Independent receiver clock input

* Transmit, Receive, Line Status, and Data Set interrupts independently controlled

* Fully programmable character formatting:

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

* Even, odd, or no-parity formats

* 1, 11/2, or 2-stop bit

* Baud generation DC to 3 Mbit/s

* False start-bit detection

* Complete status reporting capabilities

* 3-state output TTL drive capabilities for bidirectional data bus and control bus

* Line break generation and detection

* Internal diagnostic capabilities:

* Loopback controls for communications link fault isolation

* Prioritized interrupt system controls

* Modem control functions CTS, RTS, DSR, DTR, RI, DCD

1\\. For data bus pins D7 to D0, see _Table 26 "Limiting values"_.

## Features