Atmel 7698AAUTO01/07, Руководство пользователя

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Using the ATAVRAUTO200
2-8 ATAVRAUTO200 User Guide
7698A–AUTO–01/07
2.4.6 LED
The ATAVRAUTO200 includes one green LED implemented on one I/O pin. It is con-
nected to the “PortD Pin3” of the ATmega48/88/168. To light On the LED, the
corresponding port pin must drive a low level. To light 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 use.
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, EEPROM memory (and all Fuse and Lock Bit options ISP-programmable)
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.