Features:
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4 channel UART |
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5 V, 3.3 V and 2.5 V operation |
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Pin compatible with SC16C654IA68, TL16C754, and SC16C554IA68 with additional |
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enhancements, and software compatible with TL16C754 |
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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) |
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5 V tolerant inputs |
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64-byte transmit FIFO |
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64-byte receive FIFO with error flags |
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Industrial temperature range ( 40 C to +85 C) |
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Programmable and selectable transmit and receive FIFO trigger levels for DMA and |
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interrupt generation |
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Software (Xon/Xoff)/hardware (RTS/CTS ) flow control |
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Programmable Xon/Xoff characters |
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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 loop-back capabilities
Fully prioritized interrupt system controls
Modem control functions (CTS , RTS , DSR , DTR , RI and CD)
Sleep mode
PinoutDescriptionThe 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 RDY register, the software gets the status of TXRDY /RXRDY 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 loop-back 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.