3.4
Low Power Measurement
Power to the ATtiny1627 is connected from the on-board power supply and
VTG
pin through a 100 mil pin header
marked with “POWER” in silkscreen (J101). To measure the power consumption of the ATtiny1627 and other
peripherals connected to the board, cut the
Target Power strap
and connect an ammeter over the strap.
To measure the lowest possible power consumption follow these steps:
1.
Cut the POWER strap with a sharp tool.
2.
Solder a 1x2 100 mil pin header in the footprint.
3.
Connect an ammeter to the pin header.
4.
Write firmware that.
4.1.
Tri-states any I/O connected to the on-board debugger.
4.2.
Sets the microcontroller in its lowest power Sleep state.
5.
Program the firmware into the ATtiny1627.
Figure 3-7. Target Power Strap
Target Power strap (top side)
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 no longer needed, 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 2 µA can be drawn from each I/O pin connected to a level shifter for a total of 10 µA. Keep
any I/O pin connected to a level shifter in tri-state to prevent leakage. All I/Os connected to the on-board
debugger are listed in
4.2.4.1 On-Board Debugger Connections
. To prevent any leakage to the on-board
level shifters, they can be disconnected completely, as described in
7.4 Disconnecting the On-board
.
ATtiny1627
Curiosity Nano
©
2020 Microchip Technology Inc.
User Guide
DS40002199A-page 18
