Instructions

ATmega328P Xplained Mini User Guide [USER GUIDE]
42287A-MCU-05/2014
9
J100 pin Signal function
2 GND
3 JTAG_TDO
4 VCC (5V0)
5 JTAG_TMS
6 RESET
7 NC
8 NC
9 JTAG_TDI
10 GND
2.3.2 USB (J101)
J101 is a Micro-B USB connector connected to the embedded debugger (ATmega32U4).
Table 2-2. J101 USB Connector
J101 pin Function
1 VBUS
2 D-
3 D+
4 NC
5 GND
2.3.3 USART (J104)
The ATmega32U4 USART signals are available on J104 USART header.
The mEDBG CDC COM port is connected to these signals.
Table 2-3. J104 USART Header
J104 pin ATmega32U4 ATmega328P Function
1 - UART TXD PD3 PD1 TxD from ATmega32U4.
2 - UART RXD PD2 PD0 RxD to ATmega32U4.
2.3.4 Target Digital I/O (J200 and J201)
The J200 and J201 headers provide access to ATmega328P digital I/O pins.
Table 2-4. J200 I/O High Header
J200 pin &
location
ATmega328P pin Note
J200-1 PB0
J200-2 PB1
J200-3 PB2
J200-4 PB3
J200-5 PB4
J200-6 PB5/SCK Yellow USER LED D200 connected.
J200-7 GND
J200-8 AREF
J200-9 PC4/SDA TWI Serial Data.