Medbg Jtag Interface; Extension Header Area - Microchip Technology ATmega328PB Xplained Mini Manual

Table 4-8. J104 USART Header
J104 pin
1 - USART TxD PD3
2 - USART RxD PD2
4.5.2

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 4-9. J100 JTAG Header
J100 pin Signal name
1 TCK
2 GND
3 TDO
4 VCC_BOARD
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.
©
2017 Microchip Technology Inc.
ATmega32U4 ATmega328PB
PD0 (RxD)
PD1 (TxD)
Description
ATmega32U4 V
Connected to ATmega32U4 only
ATmega328PB Xplained Mini
Function
TxD out from ATmega32U4
RxD in to ATmega32U4
(J301 pin 2)
CC
User Guide
DS50002660A-page 23