Atmel AT89STK-06 Manual do Utilizador descarregar pdf (Página 7)

Hardware Description

AT89STK-06 Demo Board Software Demo Guide 2-5

4339C–CAN–07/05

2.4 Serial Interfaces

2.4.1 RS-232C All CAN microcontrollers have one on-chip UART peripheral. Only the asynchronous

mode is supported by the AT89STK-06 board.

The AT89STK-06 board is supplied with a RS-232 driver/receiver. Only one female DB9

connector assumes the RS-232 connections. A full range of configuration can be set

with two Rx lines and two Tx lines.

Figure 2-4 . RS-232 DB9 Connections

Figure 2-5 . Typical PC Connection Lay-out

Figure 2-6. RS-232 DB9

RS-232 DB9 front view

pin 2

234

RS-TxD

pin 3 RS-RxD

pin 4

pin 6

pin 5 Gnd

pin 7 RS-CTS

pin 8 RS-RTS

AT89C51CC0x / RS-232 DB9

PC / DB9 serial port

Pin Nb

(COM1 or COMx)

Function Pin Nb Function

2TxD (AT89C51CC0x)

5Gnd

RxD (PC)

TxD (PC)3RxD (AT89C51CC0x)

5 Gnd

Green Rx LED Red Tx LED

“Auto_ISP”

Jumpers

1 2 3 4 5 6 7 8 9 10 11 12 ... 21 22

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Atmel AT89STK-06 Manual do Utilizador Página 7