Target Headers And Connectors - Microchip Technology ATmega328P Xplained Mini Manual

4.3

Target Headers and Connectors

4.3.1 Target Digital I/O
The J200 and J201 headers provide access to the ATmega328P digital I/O pins.
Table 4-1. J200 Digital I/O High Byte Header
J200 Pin ATmega328P Pin
1 PB0
2 PB1
3 PB2
4 PB3
5 PB4
6 PB5
7 GND
8 AREF
9 PC4
10 PC5
Table 4-2. J201 Digital I/O High Low Header
J201 Pin ATmega328P Pin
1 PD0
2 PD1
3 PD2
4 PD3
5 PD4
6 PD5
7 PD6
8 PD7
4.3.2 Board Power Header
The J202 header enables connection to the ATmega328P Xplained Mini power system.
Table 4-3. J202 Power Header
J202 Pin Signal
1 NC
2 VCC_TARGET
3 RESET_SENSE
4 VCC_P3V3
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2020 Microchip Technology Inc.
Function
SS, SPI Bus Master Slave select
MOSI, SPI Bus Master Output/Slave Input
MISO, SPI Bus Master Input/Slave Output
SCK, SPI Bus Master Clock Input
SDA, 2-wire Serial Bus Data Input/Output Line. Shared with ADC4.
SCL, 2-wire Serial Bus Clock Line. Shared with ADC5.
Function
RXD (ATmega328P USART Input Pin)
TXD (ATmega328P USART Output Pin)
Description
The power source selected for the target (selected by J301)
This is a RESET signal monitored by the mEDBG. If pulled low, the target
RESET line will be pulled low by the mEDBG. The ATmega32U4 internal pull-up
is enabled. This signal is not available during debugging.
The 3.3V regulator output
User Guide
ATmega328P Xplained Mini
Hardware User Guide
DS50002659B-page 16