2.4
User components and status LEDs
The Musca
‑
S1 development board provides three user LEDs, reset and on/off push buttons, a DAPLink
reset push button, a power
‑
selector slider switch, and system status LEDs.
User LEDs
One RGB LED, which can be connected to Musca
‑
S1 test chip GPIO[4:2] outputs by completing the
user jumper connections:
• Red: Jumper J4 connects this LED to GPIO[2].
• Green: Jumper J3 connects this LED to GPIO[3].
• Blue: Jumper J2 connects this LED to GPIO[4].
Note
GPIO[4:2] are on multiplexed Musca
‑
S1 test chip I/O pins. The I/O multiplexer selects the signals that
appear on these pins. See the following for information on how to select the required functions at the
Musca
‑
S1 test chip I/O pins:
•
2.2.2 Test chip multiplexed I/O
•
Jumper links
A jumper link selects either USB 5V power or Li-ion 3.7V battery power:
• DAPLink 5V USB connector.
• CLN 523450, Lithium Ion, 3.7V, 950mAh, not supplied.
A jumper link selects either 3V3 or 1V8 power for the Arduino Expansion Shield.
S1 development board at a glance
for the location of the jumper links
on the board.
Status LEDs
The Musca
‑
S1 development board provides the following system status LEDs:
• PWR: Orange LED. Indicates that power is connected.
• COM: Green LED. Indicates that USB UART is active.
• DAP: Blue LED. Indicates DAP activity.
• CHRG: Orange LED. Indicates that Li-ion battery charging is in progress.
• ON: Green LED. Indicates that board power supplies are active.
User push buttons
The Musca
‑
S1 development board provides the following user push buttons:
• PBON power on/off.
• nSRST: Cortex-M33 system reset and CoreSight debug reset.
• ISP: Updates DAPLink firmware.
for more information on the user push buttons.
Related information
1.3 The Musca
S1 development board at a glance
2.2.2 Test chip multiplexed I/O
on page 2-23
3.11 Serial Configuration Control registers
on page 2-33
2 Hardware description
2.4 User components and status LEDs
101835_0000_01_en
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