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J202 pin
Signal
Description
6
GND
7
GND
8
VCC_VIN
The external power source connection (connected to J300 pin 3)
4.3.3
Target Analogue I/O
The ATmega168PB ADC input pins are available in the J203 header.
AREF is available in J200 pin 8.
Table 4-4. J203 Analogue Header
J203 pin
ATmega168PB pin
Function
1
PC0
ADC Input Channel 0
2
PC1
ADC Input Channel 1
3
PC2
ADC Input Channel 2
4
PC3
ADC Input Channel 3
5
PC4
ADC Input Channel 4
6
PC5
ADC Input Channel 5
4.3.4
Target Programming
The J204 header enables direct connection to the ISP bus with an external programmer for programming
of the ATmega168PB.
Table 4-5. SPI Header
J204 pin
ATmega168PB pin
Function
1
PB4
MISO
2
VCC target
3
PB5
SCK
4
PB3
MOSI
5
PC6
RESET
6
GND
4.3.5
Target Additional I/O
Signals not available in any of the headers or connectors are available in column 5 of the grid.
Table 4-6. Additional I/O
ATmega168PB pin
Grid position
PE01
J5
PE02
I5
ATmega168PB Xplained Mini
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2017 Microchip Technology Inc.
User Guide
DS50002636A-page 19