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
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
.
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]
Atmel-42671A-ATtiny104-Xplained-Nano_User Guide-02/2016
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