User manual

5. Embedded Debugger Implementation

ATtiny104 Xplained Nano contains a Mini Embedded Debugger (mEDBG) that can be used to program

the ATtiny104 using Tiny Program Interface (TPI). The mEDBG also include a Virtual Com port interface

over UART. Atmel Studio can be used as a front end for the Mini Embedded Debugger.

5.1. Tiny Program Interface

The Tiny Program Interface (TPI) uses two pins to communicate with the target. For further information on

how to use the programming capabilities of the mEDBG, see Mini Embedded Debugger.

Table 5-1. TPI Connections

ATtiny104 pin Function Shared functionality

PA0 TPI clock mEDBG

PA1 TPI data mEDBG

5.2. Virtual COM Port

The Embedded Debugger acts as a Virtual Com Port gateway by using one of the ATtiny104 UARTs. For

further information on how to use the Virtual COM port, see Mini Embedded Debugger.

Table 5-2. Virtual COM Port Connections

ATtiny104 pin Function Shared functionality

PB2 UART TXD (ATtiny104 TX line) mEDBG CDC RX

PB3 UART RXD (ATtiny104 RX line) mEDBG CDC TX

Atmel ATtiny104 Xplained Nano [USER GUIDE]

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