Am186™CC/CH/CU Microcontrollers User’s Manual
13-1
CHAPTER
13
ASYNCHRONOUS
SERIAL PORTS (UARTS)
13.1
OVERVIEW
The Am186CC/CH/CU microcontrollers each provide two independent asynchronous serial
ports: a Universal Asynchronous Receiver/Transmitter (UART) and a High-Speed UART.
The UARTs support the following features:
■
Up to 115.2 Kbaud rate (UART) or up to 460 Kbaud rate (High-Speed UART)
■
Automatic baudrate detection with enhancements to compensate for distortion of start
bit (High-Speed UART only)
■
32-byte receive and 16-byte transmit FIFOs with threshold at half full (High-Speed UART
only)
■
Receive-character-matching for up to six characters including address-bit matching
(High-Speed UART only)
■
7-, 8-, or 9-bit data transfers
■
Address bit generation and detection in 7- and 8-data-bit frames
■
Extended read and write modes that allow word-wide DMA transfers
■
Multidrop protocol (9-data-bit) support
■
Use of processor clock or external clock signal for generation of baud clock
■
Full-duplex operation
■
One or two stop bits
■
Even, odd, or no parity
■
Break generation and detection
■
Programmable to drive either High or Low on TXD line during break
■
Automatic hardware flow control using the clear-to-send/ready-to-receive (CTS/RTR)
protocol
■
DMA to and/or from the serial ports using the general-purpose DMA channels
■
Double-buffered transmit and receive
■
Individually maskable interrupt requests for the following conditions:
– Receive FIFO threshold reached (High-Speed UART only)
– Transmit FIFO threshold reached (High-Speed UART only)
– Receive FIFO overflow (High-Speed UART only)
– Receive data character match (High-Speed UART only)
– Transmit FIFO empty (High-Speed UART only)
– Break detected
– Received character with address bit set
– Receive data available
– Transmitter able to accept new data
– Framing error detected
Содержание Am186 CC
Страница 1: ...Am186 CC CH CU Microcontrollers User s Manual Order 21914B...
Страница 4: ...iv Am186 CC CH CU Microcontrollers User s Manual...
Страница 18: ...Table of Contents xviii Am186 CC CH CU Microcontrollers User s Manual...
Страница 24: ...Introduction xxiv Am186 CC CH CU Microcontrollers User s Manual...
Страница 39: ...Architectural Overview Am186 CC CH CU Microcontrollers User s Manual 1 15 Figure 1 6 32 Channel Linecard CH CC...
Страница 40: ...Architectural Overview 1 16 Am186 CC CH CU Microcontrollers User s Manual...
Страница 86: ...System Overview 3 36 Am186 CC CH CU Microcontrollers User s Manual...
Страница 92: ...Emulator Support 4 6 Am186 CC CH CU Microcontrollers User s Manual...
Страница 112: ...DRAM Controller 6 8 Am186 CC CH CU Microcontrollers User s Manual...
Страница 134: ...Interrupts 7 22 Am186 CC CH CU Microcontrollers User s Manual...
Страница 186: ...Programmable I O Signals 9 8 Am186 CC CH CU Microcontrollers User s Manual...
Страница 200: ...Watchdog Timer 11 6 Am186 CC CH CU Microcontrollers User s Manual...
Страница 232: ...Asynchronous Serial Ports UARTs 13 24 Am186 CC CH CU Microcontrollers User s Manual...
Страница 242: ...Synchronous Serial Port SSI 14 10 Am186 CC CH CU Microcontrollers User s Manual...
Страница 264: ...High Level Data Link Control HDLC 15 22 Am186 CC CH CU Microcontrollers User s Manual...
Страница 332: ...Universal Serial Bus USB 18 34 Am186 CC CH CU Microcontrollers User s Manual...
Страница 348: ...Register Summary A 16 Am186 CC CH CU Microcontrollers User s Manual...
Страница 376: ...Index Index 18 Am186 CC CH CU Microcontrollers User s Manual...