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Description
PC16550D Universal Asynchronous Receiver/Transmitter with FIFOs
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Features
● Capab1e of Running All Existing 16450 Software.
● Pin for Pin Compatible With the Existing 16450 Except for CSOUT (24) and NC (29). The Former CSOUT and NC Pins Are TXRDY and RXRDY, Respectively.
● After Reset,All Registers Are Identical to the 16450 Register Set.
● In the FIFO(1) Mode Transmitter and Receiver Are Each Buffered with 16 Byte FIFO’s to Reduce the Number of Interrupts Presented to the CPU.
● Adds or Deletes Standard Asynchronous Communication Bits (Start, Stop, and Parity ) to or From the seria1 Data.
● Holding and Shift Registers in the 16450 Mode Eliminate the Need for Precise Synchronization Between the CPU and Serial Data.
● Independently Controlled Transmit, Receive, Line Status, and Data Set Interrupts.
● Programmab1e Baud Generator Divides Any Input Clock by 1 to (216- 1) and Generates the 16x Clock.
● Independent Receiver Clock Input.
● MODEM Contro1 Functions (CTS, RTS, DSR, DTR, RI, and DCD).
● Fully Programmab1e Seria1-Interface Characteristics
— 5-, 6-, 7-, or 8-Bit Characters
— Even, Odd, or No-Parity Bit Generation and Detection
— 1-, 1 1/2-, or 2-Stop Bit Generation
— Baud Generation (DC to 1.5 M Baud).
● False Start Bit Detection.
● Complete Status Reporting Capabi1ities.
● TRI-STATE TTL Drive for the Data and Control Buses.
● Line Break Generation and Detection.
● Internal Diagnostic Capabilities
— Loopback Controls for Communications Link Fault Iso1ation
— Break, Parity, Overrun, Framing Error Simulation.
● Full Prioritized Interrupt System Contro1s.
Applications
Modems or Generic UART Communication This part is patented
Description
The PC16550D device is an improved version of the original 16450 Universal Asynchronous Receiver/Transmitter (UART).Functionally identical to the 16450 on power up (CHARACTER mode: can also be reset to 16450 Mode under software control) the PC16550D can be put into an alternate mode (FIFO mode) to relieve the CPU of excessive software overhead.
In this mode internal FIFOs are activated allowing 16 bytes (plus 3 bits of error data per byte in the RCVR FIFO) to be stored in both receive and transmit modes. All the logic is on chip to minimize system overhead and maximize system efficiency. Two pin functions have been changed to allow signalling of DMA transfers.
The UART performs serial-to-parallel conversion on data characters received from a periphera1 device or a MODEM, and parallel-to-serial conversion on data characters received from the CPU.The CPU can read the complete status of the UART at any time during the functional operation. Status information reported includes the type and condition of the transfer operations being performed by the UART, as well as any error conditions (parity, overrun, framing,or break interrupt).
The UART includes a programmable baud rate generator that is capable of dividing the timing reference clock input by divisors of 1 to (216-1), and producing a 16x clock for driving the internal transmitter logic. Provisions are also included to use this 16× clock to drive the receiver logic.The UART has complete MODEM-control capability, and a processor-interrupt system. Interrupts can be programmed to the user's requirements, minimizing the computing required to handle the communications link.
The UART is fabricated using Texas Instruments advanced M2CMOS process.
Preview of the first 3 pages of the data sheet
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10000 buyer reviews from United States
Brian Clark
Length of registration:7 years
Thank you for providing the IC PC16550DV. We have been using it in our application and have found it to be a reliable and cost-effective solution. The device has been easy to integrate into our system and has been performing well. We appreciate the quality of the product and the support we have received from your team.
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03/17/2023
Denis Kalishevich
Length of registration:7 years
all good
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07/18/2018
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Warranty
All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
PC16550DV
PC16550DV has several brands around the world that may have alternate names for PC16550DV due to regional differences or acquisition. PC16550DV may also be known as the following names:
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Unit Price:2.13705
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