AVR2016
9
8117D-AVR-04/08
Table 3-3. ATmega1284P User IO ATmega1284P Port Pin PCB Connection Comment
PC0 J201-1
TWI SCL.
Connected to serial EEPROM
PC1 J201-2
TWI SDA.
Connected to serial EEPROM
PC2 J201-3 JTAG TCK.
PC3 J201-4 JTAG TMS.
PC4 J201-5 JTAG TDO.
PC5 J201-6 JTAG TDI.
N.C. J201-7
Populate R204 to connect to
PC6. RTC Xtal XC202 must
then be removed.
N.C. J201-8
Populate R205 to connect to
PC6. RTC Xtal XC202 must
then be removed.
PD0 J202-1
RXD0 Inter processor
communication.
PD1 J202-2
TXD0 Inter processor
communication.
PD2 J202-3 DIO or RXD1.
PD3 J202-4 DIO or TXD1.
PD4 J202-5 DIO.
PD5 J202-6 DIO.
PB2 J202-7 DIO. NB: NOT PD6!
PD7 J202-8 DIO.
PA0 J203-1 DIO or ADC Channel 0.
PA1 J203-2 DIO or ADC Channel 1.
PA2 J203-3 DIO or ADC Channel 2.
PA3 J203-4 DIO or ADC Channel 3.
PA4 J203-5 DIO or ADC Channel 4.
PA5 J203-6 DIO or ADC Channel 5.
PA6 J203-7 DIO or ADC Channel 6.
PA7 J203-8 DIO or ADC Channel 7.
Additional interfaces PCB Connection Comment
External power J201-10
J202-10
J203-10
Connected to J401-1
0V J201-9
J202-9
J203-9
Connected to J401-2