mEDBG JTAG Interface

The mEDBG (ATmega32U4) JTAG interface is available for programming and debugging of the ATmega32U4 on the 50-mil header in the upper right corner of the kit.

Table 1. J100 JTAG Header
J100 Pin Signal Name Description
1 TCK  
2 GND  
3 TDO  
4 VCC_BOARD ATmega32U4 VCC (J301 pin 2)
5 TMS  
6 RESET Connected to ATmega32U4 only
7 NC  
8 NC  
9 TDI  
10 GND