ATSTK500 Atmel, ATSTK500 Datasheet - Page 15

• Manufacturer Part Number: ATSTK500
• Description: PROGRAMMER AVR STARTER KIT
• Manufacturer: Atmel
• Series: AVR®r
• Type: MCUr

Specifications of ATSTK500

• Contents: Board, Cable, CD and Documentation
• Data Bus Width: 8 bit
• Interface Type: RS-232
• For Use With/related Products: Atmel AVR Devices
• For Use With: ATADAPCAN01 - EXTENSION CAN ADD-ON TO STK500/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.5
AVR STK500 User Guide
Description of
User RS-232
Interface
The STK500 includes two RS-232 ports. One RS-232 port is used for communicating
with AVR Studio. The other RS-232 can be used for communicating between the target
AVR microcontroller in the socket and a PC serial port connected to the RS-232. To use
the RS-232, the UART pins of the AVR need to be physically connected to the RS-232.
The 2-pin header marked “RS232 SPARE” can be used for connecting the RS-232 con-
verter to the UART pins on the target AVR microcontroller in the socket. Use the 2-wire
cable to connect the UART pins to the RS-232. The connection is shown in Figure 3-9.
The block schematic of the RS-232 connection is shown in Figure 3-10.
Figure 3-9. Connection of I/O Pins to UART
Figure 3-10. Schematic of UART Pin Connections
TXD
RXD
VTG
Converter
Voltage
5V
MAX202CSE
5V
470R
470R
1n2
1n2
Hardware Description
1925C–AVR–3/03
RS-232
3
2
3-5