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Texas Instruments TL16C554 Asynchronous Communication Element

Texas Instruments TL16C554 Asynchronous Communications Element is an enhanced quadruple version of the TL16C550B asynchronous communications element (ACE) with steering logic. Each channel of the TI TL16C554 ACE performs serial-to-parallel conversion on data characters received from peripheral devices or modems and parallel-to-serial conversion on data characters transmitted by the CPU. The complete status of each channel of the quadruple ACE can be read at any time during functional operation by the CPU. The information obtained includes the type and condition of the operation performed and any error conditions encountered. The Texas Instruments TL16C554 ACE can be placed in an alternate FIFO mode that activates the internal FIFOs to allow 16 bytes to be stored in both receive and transmit modes.

Features

  • Integrated Asynchronous Communications Element
  • Consists of Four Improved TL16C550 ACEs Plus Steering Logic
  • In FIFO Mode, Each ACE Transmitter and Receiver Is Buffered With 16-Byte FIFO to Reduce the Number of Interrupts to CPU
  • In TL16C450 Mode, Hold and Shift Registers Eliminate Need for Precise Synchronization Between the CPU and Serial Data
  • Up to 16MHz Clock Rate for up to 1-Mbaud Operation
  • Programmable Baud Rate Generators Which Allow Division of Any Input Reference Clock by 1 to (216-1) and Generate an Internal 16 × Clock
  • Adds or Deletes Standard Asynchronous Communication Bits (Start, Stop, and Parity) to or From the Serial Data Stream
  • Independently Controlled Transmit, Receive, Line Status, and Data Set Interrupts
  • Fully Programmable Serial Interface Characteristics: 5-, 6-, 7-, or 8-Bit Characters
  • Even-, Odd-, or No-Parity Bit
  • 1-, 1 1/2-, or 2-Stop Bit Generation
  • Baud Generation (DC to 1Mbit Per Second)
  • False Start Bit Detection
  • Complete Status Reporting Capabilities
  • Line Break Generation and Detection
  • Internal Diagnostic Capabilities: Loopback Controls for Communications Link Fault Isolation
  • Break, Parity, Overrun, Framing Error Simulation
  • Fully Prioritized Interrupt System Controls
  • Modem Control Functions (CTS\, RTS\, DSR\, DTR\, RI\, and DCD\)
  • 3-State Outputs Provide TTL Drive Capabilities for Bidirectional Data Bus and Control Bus

Functional Block Diagram

Block Diagram - Texas Instruments TL16C554 Asynchronous Communication Element
Publicado: 2010-03-16 | Actualizado: 2022-03-11