ATSTK500 Atmel, ATSTK500 Datasheet - Page 29

• 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

AVR STK500 User Guide
Figure 3-25. RESET Jumper Options
The STK500 master microcontroller controls the RESET signal to the target AVR. The
RESET signal is accessible on the PORTE/AUX header; this pin can also be used for
external RESET signal. Figure 3-26 shows the internal connection of the RESET signal.
Figure 3-26. Internal RESET Connection
Note:
On-board RESET Signal Connected (default)
Jumper Mounted
Jumper not Mounted
On-board RESET Signal Disconnected
Master
MCU
During High-voltage Programming, STK500 applies 12V to the AVR’s RESET
line. Thus, an external reset circuit not capable of handling this must be discon-
nected before High-voltage Programming the AVR.
RESET
RESET
RESET
AREF
XTAL1
XTAL1
AREF
RESET
CIRCUIT
0V - VTG - 12V
GND
REF
PE0
PE2
XT1
PORTE/AUX
1 2
PE1
RST
GND
XT2
VTG
RESET
Jumper
Hardware Description
RESET NET
1925C–AVR–3/03
3-19