3.1.3.4

Special Commands

Several utility commands are supported by copying text files to the mass storage disk. The filename or extension is

irrelevant – the command handler reacts to content only.

Table 3-2. Special File Commands

Command Content

Description

CMD:ERASE

Executes a chip erase of the target

CMD:SEND_UART=

Sends a string of characters to the CDC UART. See “CDC

Override Mode”.

CMD:SEND_9600=CMD:SEND_115200=CMD:SE

ND_460800=

Sends a string of characters to the CDC UART at the baud rate

specified. Note that only the baud rates explicitly specified here

are supported! See “CDC Override Mode” (Debugger firmware

v1.21 or newer.)

CMD:RESET

Resets the target device by entering Programming mode and

then exiting Programming mode immediately thereafter. Exact

timing can vary according to the programming interface of the

target device. (Debugger firmware v1.16 or newer.)

CMD:POWERTOGGLE

Powers down the target and restores power after a 100 ms

delay. If external power is provided, this has no effect.

(Debugger firmware v1.16 or newer.)

CMD:0V

Powers down the target device by disabling the target supply

regulator. If external power is provided, this has no effect.

(Debugger firmware v1.16 or newer.)

CMD:1V8

Sets the target voltage to 1.8V. If external power is provided,

this has no effect. (Debugger firmware v1.21 or newer.)

CMD:3V3

Sets the target voltage to 3.3V. If external power is provided,

this has no effect. (Debugger firmware v1.16 or newer.)

CMD:5V0

Sets the target voltage to 5.0V. If external power is provided,

this has no effect. (Debugger firmware v1.16 or newer.)

Info:  The commands listed here are triggered by the content being sent to the mass storage emulated

disk, and no feedback is provided in the case of either success or failure.

3.1.4

Data Gateway Interface (DGI)

Data Gateway Interface (DGI) is a USB interface for transporting raw and timestamped data between on-board

debuggers and host computer-based visualization tools. MPLAB Data Visualizer is used on the host computer to

display debug GPIO data. It is available as a plug-in for MPLAB® X IDE or a stand-alone application that can be used

in parallel with Atmel Studio/Microchip MPLAB® X IDE.

Although DGI encompasses several physical data interfaces, the ATtiny1627 Curiosity Nano implementation includes

logic analyzer channels:

• Two debug GPIO channels (also known as DGI GPIO)

3.1.4.1

Debug GPIO

Debug GPIO channels are timestamped digital signal lines connecting the target application to a host computer

visualization application. They are typically used to plot the occurrence of low-frequency events on a time-axis – for

example, when certain application state transitions occur.

ATtiny1627

Curiosity Nano

© 2020 Microchip Technology Inc.

User Guide

DS40002199A-page 12