Extension Header Area - Microchip Technology ATmega328P Xplained Mini Manual

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J100 Pin Signal Name
5 TMS
6 RESET
7 NC
8 NC
9 TDI
10 GND
4.6

Extension Header Area

The marked area on the grid I7 to R8 can be used for strapping in an Xplained Pro extension header or a 10-pin
legacy Xplained/RZ600 header.
Figure 4-6. Extension Header Area
The SPI bus signals are available close to the header at row J and K, enabling easy connection to header pin 15 to
18.
Using pins 11 to 20 enables connection of the 10-pin legacy header used on the RZ600 wireless modules and the 10-
pin Xplained sensor modules.
The general bus connections for an Xplained Pro Extension board are indicated in the table below. Detailed wiring
can be found in the selected extension board documentation.
Table 4-9. Extension Header Typical Signals
Pin Signal Name
1 ID
2 GND
3 ADC(+)
4 ADC(-)
5 GPIO1
6 GPIO2
7 PWM(+)
8 PWM(-)
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2020 Microchip Technology Inc.
Description
Connected to ATmega32U4 only
Signal Description
Communication line to the ID chip on the Xplained extension board
Ground
Analog-to-Digital converter, alternatively positive part of differential ADC
Analog-to-Digital converter, alternatively negative part of differential ADC
General purpose I/O
General purpose I/O
Pulse-Width Modulation, alternatively positive part of differential PWM
Pulse-Width Modulation, alternatively negative part of differential PWM
User Guide
ATmega328P Xplained Mini
Hardware User Guide
DS50002659B-page 20