STK1000/USART interface

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USART's are used for generic serial communication between AVR32 processors and peripherals.

Peripherals and connectors

Notes to developers

Two USART interfaces is available on STK1000. When the USART_CLK signal is not used for the peripheral on the Motherboard the interface is referred to as a UART interface instead of a USART interface. STK1000 have one UART interface

UART_B is dedicated to the IrDA tranceiver while USART_A and USART_C can be used either by the RS232 level converters and the RS232 connectors or they can be accessed on the PCI style expansion connector or the general expansion headers. Jumpers are used to select the use of signals that may collide if driven by several sources. This applies to the RXD and CTS signals that are driven by STK1000 level converters or by circuitry connected to the General expansion headers or the PCI style expansion connector.

Signals

Please refer the datasheet for the AVR32 processor on you daughter board for a description of these signals

SignalDescription
RXDReceive serial data
TXDTransmit serial data
CTSClear to send
RTSRequest to send
CLKSerial clock
Static version created: 2007-03-07
Copyright (c) 2007 Atmel Corporation