SIM3C1XX-B-DK Silicon_Laboratories, SIM3C1XX-B-DK Datasheet - Page 9

• Manufacturer Part Number: SIM3C1XX-B-DK
• Description: Specifications: Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant
• Manufacturer: Silicon_Laboratories

4.6. Power LEDs (DS1, DS2)
The two power LEDs provide visual feedback when the board is powered. When the System Power Select Switch
is in the WALL position, the PWR WALL LED (DS1) will turn on when the device is powered through the P1
connector or by connecting a power supply to any power header on the board. When the System Power Select
Switch is in the MB position, the PWR MB LED (DS2) will turn on when the device is powered by a UDP
Motherboard.
4.7. Imeasure Jumpers (J14, J15, J17)
The 5V WALL (J14), VDD (J15), and VIO (J17) Imeasure jumpers allow for easy access to measure the supply
current of the MCU. The shorting blocks for these headers are populated by default. To measure the supply
current, remove the corresponding shorting block and connect a current measurement device across the
unpopulated header.
4.8. VIOHD Selection Jumper (J18)
The VIOHD jumper allows for the VIOHD pin on the MCU to be connected to the VIO power supply, the HV1 signal
from the UDP Motherboard, or to an external power supply. The HV1 option is only available if the MCU is
connected to a UDP Motherboard. To power from an external supply, remove the shorting block and connect the
supply to pin 2 of the header.
4.9. UART VCP Connection Options (J10)
The MCU card features a USB virtual COM port (VCP) UART connection via the mini-B USB connector (J10)
labeled “COM PORT”. The VCP connection uses the CP210x USB-to-UART bridge chip. The GPIO pins
connected to the CP210x device can be enable or disabled when connected to a UDP Motherboard as necessary.
When the MCU card is not connected to the UDP Motherboard, the TX, RX, CTS, and RTS signals are all
connected to the CP210x device. Table 3 shows the GPIO pins that are routed to the CP210x or UDP
Motherboard.
4.10. Debug Header (J31)
The mini 10-pin debug header supports the Silicon Labs USB Debug Adapter. This connector provides a Serial
Wire (SW) debug connection to the SiM3C1xx on the MCU card.
Table 3. CP210x Controlled GPIO Pins
GPIO Pin
PB1.12
PB1.13
PB1.14
PB1.15
User Control Function
Rev. 0.1
CTS
RTS
RX
TX
UDP SiM3C1xx
9