7.4

Disconnecting the On-board Debugger

The on-board debugger and level shifters can be completely disconnected from the ATtiny1627.

The block diagram below shows all connections between the debugger and the ATtiny1627. The rounded boxes

represent connections to the board edge. The signal names shown are also printed in silkscreen on the bottom side

of the board.

To disconnect the debugger, cut the straps shown in Figure 7-6.

Attention:  Cutting the GPIO straps to the on-board debugger will disable the virtual serial port,

programming, debugging, and data streaming. Cutting the power supply strap will disconnect the on-board

power supply.

Tip:  Any connection that is cut can be reconnected using solder. Alternatively, a 0Ω 0402 resistor can be

mounted.

Tip:  When the debugger is disconnected, an external debugger can be connected to holes shown in

Figure 7-6. Details about connecting an external debugger are described in 3.6 Connecting External

Debuggers.

Figure 7-5.  On-Board Debugger Connections Block Diagram

TARGET

Level-Shift

PA04/PA06

PA07

PA08

PA16

PA00

PA01

USB

DIR x 5

VCC_P3V3

VBUS

DBG0

DBG1

DBG2

DBG3

CDC TX

CDC RX

CDC RX

CDC TX

DBG3

DBG2

DBG1

DBG0

GPIO straps

LDO

VOFF

LDO

VBUS

VTG

VCC_EDGE

Power Supply strap

Target Power strap

UART RX

UART TX

ATtiny1627

Appendix

© 2020 Microchip Technology Inc.

User Guide

DS40002199A-page 33