SC16C554DBIA68,529

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1. Description

The SC16C554DBIA68,529 is a 4-channel Universal Asynchronous Receiver and Transmitter (QUART) 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 5 Mbit/s. It comes with an Intel (16 mode) or Motorola (68 mode) interface. The SC16C554B/554DB is pin compatible with the ST16C554 and TL16C554 and it will power-up to be functionally equivalent to the 16C454. Programming of control registers enables the added features of the SC16C554B/554DB. Some of these added features are the 16-byte receive and transmit FIFOs, four receive trigger levels. The SC16C554B/554DB also provides DMA mode data transfers through FIFO trigger levels and the TXRDY and RXRDY signals. (TXRDY and RXRDY signals are not available in the HVQFN48 package.) 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 SC16C554B/554DB operates at 5 V, 3.3 V and 2.5 V, and the industrial temperature range, and is available in plastic PLCC68, LQFP64, LQFP80, and HVQFN48 packages. On the HVQFN48 package only, channel C has all the modem pins. Channels A and B have only RTSn and CTSn pins and channel D does not have any modem pin.

2. Features

    1. 4 channel UART

    2. 5 V, 3.3 V and 2.5 V operation

    3. Industrial temperature range (−40 °C to +85 °C)

    4. The SC16C554B is pin and software compatible with the industry-standard ST16C454/554, ST68C454/554, ST16C554, TL16C554

    5. The SC16C554DB is pin and software compatible with ST16C554D, and software compatible with ST16C454/554, ST16C554, TL16C554

    6. Up to 5 Mbit/s data rate at 5 V and 3.3 V, and 3 Mbit/s at 2.5 V

    7. 5 V tolerant on input only pins1

    8. 16-byte transmit FIFO

    9. 16-byte receive FIFO with error flags

  10. Programmable auto-RTS and auto-CTS

        - In auto-CTS mode, CTS controls transmitter

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

  11. Automatic hardware flow control (RTS/CTS)

  12. Software selectable baud rate generator

  13. Four selectable Receive FIFO interrupt trigger levels

  14. Standard modem interface

  15. Standard asynchronous error and framing bits (Start, Stop, and Parity Overrun Break)

  16. Transmit, Receive, Line Status, and Data Set interrupts independently controlled

  17. Fully programmable character formatting:

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

        - Even, odd, or no-parity formats

        - 1, 11∨2, or 2-stop bit  

        - Baud generation (DC to 5 Mbit/s)

  18. False start-bit detection

  19. Complete status reporting capabilities

  20. 3-state output TTL drive capabilities for bidirectional data bus and control bus

  21. Line break generation and detection

  22. Internal diagnostic capabilities:

        - Loopback controls for communications link fault isolation

  23. Prioritized interrupt system controls

  24. Modem control functions (CTS, RTS, DSR, DTR, RI, CD).

3. Pin configuration

4. Function Description

SC16C554DBIA68,529 provides serial asynchronous receive data synchronization, parallel-to-serial and serial-to-parallel data conversion for the transmitter and receiver section. These functions are useful for converting serial data streams to Parallel data required by digital data systems. Serial data synchronization Streams are implemented by adding start and stop bits to the transmitted data to form data Features. Data integrity is ensured by appending parity bits to data characters. This The receiver checks the parity bits for any transmitted bit errors. electronic circuit Providing all of these functions is rather complex, especially when single-manufacturing Integrated silicon chip. The SC16C554B/554DB represents such an integration Greatly enhanced functionality. The SC16C554B/554DB are manufactured with advanced The CMOS process achieves low drain power and high speed requirements. The SC16C554B/554DB is an upward solution offering 16-byte transfers and Receive FIFO memory, not absent in the 16C454. SC16C554B/554DB Yes Designed for use in environments requiring high-speed modems and shared networks Fast data processing time. SC16C554B/554DB achieve higher performance through larger transmit and receive FIFOs. This allows an external processor to handle More network tasks in a given time. Additionally, four selectable levels of FIFO Uniquely provides triggered interrupts for maximum data throughput performance, Especially when running in a multi-channel environment. combination of the above Greatly reduces the bandwidth requirements of the external control CPU, increasing the performance and reduce power consumption. SC16C554B/554DBAI68 combines the package interface mode of 16C454/554 and 68C454/554 series on a single integrated chip. The 16-mode interface is designed to Operates using an Intel-style microprocessor bus, while 68 mode is designed to Works with Motorola and other popular microprocessors. After reset, SC16C554B/554DBAI68 is backward compatible with 16C454/554 or 68C454/554, depending on the state of the interface mode select pin, 16/68. The SC16C554B/554DB is capable of running at 1.5 Mbit/s using a 24 MHz crystal, and External clock input up to 5 Mbit/s (at 3.3 V and 5 V; at 2.5 V, maximum speed 3 Mbit/s). The rich feature set of SC16C554B/554DB is available through internal registers. Selectable receive FIFO trigger levels, selectable transmit and receive baud rates, and Modem interface controls are standard features. In 16-bit mode, INTSEL and MCR Can be configured to provide software control or continuous interrupt functionality. expired For pin constraints on the 64-pin package, this feature is provided by two different LQFP64s Bag. The SC16C554DB operates in continuous interrupt enable mode by Internally connect INTSEL to VCC. SC16C554B used with MCR By internally bonding INTSEL to GND