The SC16C752B is a dual 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 SC16C752B 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 Rdy register, the software gets the status of TXRDYn/RXRDYn for 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 TXn signal and receives characters on the RXn signal. Characters can be programmed to be 5 bits, 6 bits, 7 bits, 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 SC16C752B is available in plastic LQFP48 and HVQFN32 packages.
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## Features
* Pin compatible with SC16C2550 with additional enhancements
* Up to 5 Mbit/s baud rate (at 3.3 V and 5 V; at 2.5 V maximum baud rate is 3 Mbit/s)
* 64-byte transmit FIFO
* 64-byte receive FIFO with error flags
* Programmable and selectable transmit and receive FIFO trigger levels for DMA and interrupt generation
* Software/hardware 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
* 5 V tolerant on input only pins1
* Software selectable baud rate generator
* Prescaler provides additional divide-by-4 function
* Industrial temperature range (–40 ℃ to +85 ℃)
* Pin and software compatible with SC16C752, TL16C752
* Fast data bus access time
* Programmable Sleep mode
* Programmable serial interface characteristics
* 5-bit, 6-bit, 7-bit, 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)
