TL16C2552 Datasheet, PDF (1/34 Pages) Texas Instruments – 1.8-V to 5-V DUAL UART WITH 16-BYTE FIFOS

TL16C2552
www.ti.com
SLWS163A – SEPTEMBER 2005 – REVISED JUNE 2006
1.8-V to 5-V DUAL UART WITH 16-BYTE FIFOS
FEATURES
• Programmable Auto-RTS and Auto-CTS
• In Auto-CTS Mode, CTS Controls the
Transmitter
• In Auto-RTS Mode, RCV FIFO Contents, and
Threshold Control RTS
• Serial and Modem Control Outputs Drive a
RJ11 Cable Directly When Equipment is on
the Same Power Drop
• Capable of Running With All Existing
TL16C450 Software
• After Reset, All Registers Are Identical to the
TL16C450 Register Set
• Up to 24-MHz Clock Rate for up to 1.5-Mbaud
Operation With V_CC = 5 V
• Up to 20-MHz Clock Rate for up to
1.25-Mbaud Operation With V_CC = 3.3 V
• Up to 16-MHz Clock Rate for up to 1-Mbaud
Operation With V_CC = 2.5 V
• Up to 10-MHz Clock Rate for up to 625-kbaud
Operation With V_CC = 1.8 V
• In the TL16C450 Mode, Hold and Shift
Registers Eliminate the Need for Precise
Synchronization Between the CPU and Serial
Data
• Programmable Baud Rate Generator Allows
Division of Any Input Reference Clock by 1 to
(2¹⁶ - 1) and Generates an Internal 16 × Clock
• Standard Asynchronous Communication Bits
(Start, Stop, and Parity) Added to or Deleted
From the Serial Data Stream
• 5-V, 3.3-V, 2.5-V, and 1.8 V Operation
• Independent Receiver Clock Input
• Transmit, Receive, Line Status, and Data Set
Interrupts Independently Controlled
• Fully Programmable Serial Interface
Characteristics:
– 5-, 6-, 7-, or 8-Bit Characters
– Even-, Odd-, or No-Parity Bit Generation
and Detection
– 1-, 1 ½-, or 2-Stop Bit Generation
– Baud Generation (dc to 1 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
– Break, Parity, Overrun, and Framing Error
Simulation
• Fully Prioritized Interrupt System Controls
• Modem Control Functions (CTS, RTS, DSR,
DTR, RI, and DCD)
• Available in 44-Pin PLCC (FN) or 32-Pin QFN
(RHB) Packages
• Each UART's Internal Register Set May Be
Written Concurrently to Save Setup Time
• Multi-Function Output (MF) Allows Users to
Select Among Several Functions, Saving
Package Pins
APPLICATIONS
• Point-of-Sale Terminals
• Gaming Terminals
• Portable Applications
• Router Control
• Cellular Data
• Factory Automation
DESCRIPTION
The TL16C2552 is a dual universal asynchronous
receiver and transmitter (UART). It incorporates the
functionality of two TL16C550D UARTs, each UART
having its own register set and FIFOs. The two
UARTs share only the data bus interface and clock
source, otherwise they operate independently.
Another name for the UART function is
Asynchronous Communications Element (ACE), and
these terms will be used interchangeably. The bulk
of this document describes the behavior of each
ACE, with the understanding that two such devices
are incorporated into the TL16C2552.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2006, Texas Instruments Incorporated