IMP16C450 Universal Asynchronous Receiver/Transmitter (UART)
■IMP16C450 Universal Asynchronous Receiver Transmitter (UART) is a CMOS-VLSI communication device in a single package.
■The UART performs serial to parallel conversion on data characters received from a peripheral device or a MODEM, and parallel-to-serial conversions 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 operation being performed by the UART, as well as any error conditions (parity, overrun, framing, or break detect).
■The IMP16C450 UART performs serial-to-parallel conversion on data characters received from a peripheral 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 capable of dividing the timing reference clock input by divisor of 1 to (216-1), and producing a 16 x clock to drive the internal transmitter logic. Provisions are also included to use this 16 x clock to drive the receiver logic. The UART has complete MODEM-control capability, and a processor interrupts system. Interrupts can be programmed to the user’s the requirements, minimizing the computing required to handle the communications link. UART is designed to work either in a polled or an interrupt driven environment selected by software. The UART is fabricated using IMP’s advanced double metal CMOS process.
●Key Features
■5V Operation
■Full duplex asynchronous receiver and transmitter
■Easily interfaces to most popular microprocessors
■Adds or deletes standard asynchronous communication bits (start, stop, and parity ) to or from a serial data stream
■Independently controlled transmitter, receiver, line status, and data set interrupts
■Programmable baud rate generator allows division of any input clock by 1 to (216-1) and generates the internal 16 x clock
■Independent receiver clock input
■MODEM control functions (CTS, RTS, DSR, DTR, RI, and DCD)
■Fully 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
◆Baud generation (DC to 56k baud)
■False start bit detection
■Complete status reporting capabilities
■Tri-State® TTL drive capabilities for bi-directional 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 systems control
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Universal Asynchronous Receiver Transmitter (UART) 、 Universal Asynchronous Receiver/Transmitter (UART) 、 UART |
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Datasheet |
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Please see the document for details |
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DIP;PLCC;TQFP |
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English Chinese Chinese and English Japanese |
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08/08/05 |
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Revision:A |
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405 KB |
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