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NuMaker-M256SD
May 20, 2022
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3.5
External Reference Voltage Connector
Table 3-14 presents the external reference voltage connector.
Connector
Description
VREF1
Connector for user to connect to the external reference voltage pin of the
target chip. User needs to remove the L5 ferrite bead.
Table 3-14 External Reference Voltage Connector
3.6
Ammeter Connector
Table 3-15 presents the ammeter connector.
Connector
Description
AMMETER
Connector for user to measure the target chip power consumption easily.
User needs to remove the R16 resistor.
Table 3-15 Ammeter Connector
Remove the R16 Resistor
Figure 3-8 Wiring between Ammeter Connector and Ammeter
3.7
Touch Key
Table 3-16 presents the touch key, shielding electrode and reference pad.
Connector
Description
TK1
Touch key.
TK3
Shielding electrode.
TK0
Reference pad.
Table 3-16 Touch Key