Section 6
In-System Programming of an
External Target System
The STK500 can be used as a programmer to program AVR devices in other applica-
tions. There are two different ISP connector pinouts available: a 6-pin and a 10-pin
version. Both are supported by STK500.
Figure 6-1. 6-pin ISP Connector Pinout
12
MISO
VTG
SCK
MOSI
RST
GND
ISP6PIN
Figure 6-2. 10-pin ISP Connector Pinout
12
MOSI
VTG
NC
GND
RST
GND
SCK
GND
MISO
GND
ISP10PIN
Select the device to be programmed in the same way as programming a device on the
STK500. The VCC of the target application is detected by STK500 and signals are con-
verted into voltage levels suitable for the target system.
Note: If the other application has its own power supply to VTG, the jumper VTARGET
must be removed before connecting STK500 to the other application. STK500
may be damaged if the VTARGET jumper is not removed.
AVR STK500 User Guide
6-1
Rev. 1925C–AVR–3/03