Hardware User Guide; Board Overview; Clock Distribution; Headers And Connectors - Atmel ATmega168 User Manual

2.

Hardware User Guide

2.1

Board Overview

Figure 2-1. ATmega168XMINIoverview.png
2.2

Clock Distribution

The ATmega32U4 (mEDBG) has an external 16MHz XTAL.
The ATmega32U4 provides an external 16MHz clock to the ATmega168 (target).
2.3

Headers and Connectors

The board connectors.
2.3.1

JTAG (J100)

J100 is the JTAG programming header typically used by the JTAGICE for programming of the ATmega32U4
(mEDBG).
Table 2-1. JTAG
J100 pin
1
Signal function
JTAG_TCK
ATmega168 Xplained Mini User Guide [USER GUIDE] 10
42250A-MCU-02/2014