for information on using the jumper links to select board and Shield power
sources and selecting the
IOREF
reference voltage.
Caution
The maximum currents available from the Musca
‑
S1 development board for the Arduino Expansion
Shield power and reference pins are:
3V3/IOREF
Maximum current available is 500mA from USB 2.0, or 900mA from a charging port.
5V
Maximum current available is 500mA from USB 2.0, or 900mA from a charging port.
Arduino Expansion Shield multiplexed I/O
The
GPIO[15:0]
signals form part of the multiplexed Musca
‑
S1 test chip I/O. The IOMUX registers
control the GPIO multiplexer to select the signals at the Musca
‑
S1 test chip I/O. The registers must select
the correct signals for the I
2
C, I
2
S, SPI, and UART interfaces to be available at the Arduino Expansion
Shield.
See the following for information on how to select the required signals at the Musca
‑
S1 test chip I/O
pins:
•
2.2.2 Test chip multiplexed I/O
•
Related information
1.3 The Musca
S1 development board at a glance
A.1 Arduino Expansion Shield connectors
on page Appx-A-178
2 Hardware description
2.10 Arduino Expansion Shield interface
101835_0000_01_en
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