Fuse Bytes; Curiosity Nano Standard Pinout - Microchip Technology ATtiny1607 Curiosity Nano Hardware User's Manual

• KIT-INFO.TXT - a text file containing details about the kit firmware, name, serial number, and
device.
• STATUS.TXT - a text file containing the programming status of the board.
Info: STATUS.TXT is dynamically updated by the on-board debugger, the contents may be
cached by the OS and therefore not reflect the correct status.
3.1.2.2

Fuse Bytes

Fuse Bytes (AVR
The debugger does not mask any fuse bits or combinations when writing fuses. It is not possible to
disable UPDI by fuse setting on devices with a dedicated UPDI pin. For devices with a shared/
configurable UPDI pin, be sure not to select an alternate pin function for UPDI either by fuse setting in
Programming mode or by using the I/O view or memory views to modify the memory-mapped fuse
values. Disabling UPDI will render the debugger unable to contact the target device — an external
programmer capable of 12V UPDI activation will be required.
3.2

Curiosity Nano Standard Pinout

The twelve edge connections closest to the USB connector on Curiosity Nano kits have a standardized
pinout. The program/debug pins have different functions depending on the target programming interface
as shown in the table and figure below.
Table 3-2. Curiosity Nano Standard Pinout
Debugger Signal
ID
CDC TX
CDC RX
DBG0
DBG1
DBG2
DBG3
NC
VBUS
VOFF
VTG
GND
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2019 Microchip Technology Inc.
®
MCU Targets)
UPDI Target
-
UART RX
UART TX
UPDI
GPIO1
GPIO0
RESET
-
-
-
-
-
ATtiny1607 Curiosity Nano
Description
ID line for extensions.
USB CDC TX line.
USB CDC RX line.
Debug data line.
Debug clock line/DGI GPIO.
DGI GPIO.
Reset line.
No connect.
VBUS voltage for external use.
Voltage Off input.
Target voltage.
Common ground.
User Guide
Curiosity Nano
DS50002897A-page 9