Tip:
A 100-mil pin header can be soldered into the
Target Power strap
(J101) footprint for easy
connection of an ammeter. Once the ammeter is not needed anymore, place a jumper-cap on
the pin header.
Info:
The on-board level shifters will draw a small amount of current even when they are not in
use. A maximum of 10 µA can be drawn from the target power net, and an additional 2 µA can
be drawn from each I/O pin connected to a level shifter for a total of 20 µA. Disconnect the on-
board debugger and level shifters as described in Section
3.5 Disconnecting the On-Board
and keep any I/O pin connected to a level shifter in tri-state to prevent leakage.
3.5
Disconnecting the On-Board Debugger
The block diagram below shows all connections between the debugger and the ATtiny1607
microcontroller. The rounded boxes represent connections to the board edge on ATtiny1607 Curiosity
Nano. The signal names shown in
are printed in silkscreen on the bottom side of the board.
Figure 3-6. On-Board Debugger Connections to the ATtiny1607
DEBUGGER
TARGET
Level-Shift
PA04/PA06
PA07
PA08
PA16
PA00
PA01
USB
DIR x 5
VCC_P3V3
VBUS
VCC_LEVEL
VCC_T
ARGET
DBG0
DBG1
DBG2
DBG3
CDC TX
CDC RX
CDC RX
CDCTX
DBG3
DBG2
DBG1
DBG0
GPIO straps
LDO
VOFF
LDO
VBUS
VTG
VCC_EDGE
Power Supply strap
Target Power strap
By cutting the
GPIO straps
with a sharp tool, as shown in
, all I/Os connected between the
debugger and the ATtiny1607 are completely disconnected. To completely disconnect the target regulator
and level shifter power from the target, cut the
Power Supply strap
(J100) as shown in
.
Info:
Cutting the connections to the debugger will disable programming, debugging, data
streaming, and the target power supply. The signals will also be disconnected from the board
edge next to the on-board debugger section.
ATtiny1607 Curiosity Nano
Curiosity Nano
©
2019 Microchip Technology Inc.
User Guide
DS50002897A-page 13
