Using the ATAVRAUTO200
2-8 ATAVRAUTO200 User Guide
7698A–AUTO–01/07
2.4.6 LED
The ATAVRAUTO2 00 includes one g reen LED implement ed on one I/O pin. It is con-
nect ed t o the “Po rtD Pin3” of the ATmeg a48/ 88/16 8. To lig ht O n th e LED , th e
corresponding port pin must drive a low level. To l ight Off the LED, the corresponding
port pin must drive a high level.
Figure 2-8. LED schematic
2.4.7 BOOT
An additional jumper (BOOT) has been added. This jumper is available for custom us e.
For example : the BOOT jumper can be used to switch from the application to the boot-
loader by firmware (Not implemented in the example) by reading the pin7 of PortB.
Figure 2-9. BOOT Jumper
2.5 In-System Programming
The ATmega88 can be programmed using specific SPI serial links. This sub section
will explain how to connect the programmer.
The Flash, E EPROM memory ( and all Fuse an d Lock Bit opt ions ISP-programma ble)
can be programmed individually or with the sequential automatic programming option .
Note: If debugWire fuse is enabled, AVR ISP can’t be used. If debugWire fuse is dis-
abled, JTAGICE mkII have to be used in ISP mode to enable debugWire fuse.
Note: When programming, the NISP jumper has to be removed.