SIM3U1XX-B-DK Silicon_Laboratories, SIM3U1XX-B-DK Datasheet - Page 11

• Manufacturer Part Number: SIM3U1XX-B-DK
• Description: Specifications: Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant
• Manufacturer: Silicon_Laboratories

4.15. MCU Card Default and Optional Connections
The MCU card has many default and optional connections for use with different I/O cards and the UDP
motherboard. The default connections are via shorting jumpers. The shorting jumpers are a 603 resistor footprint
with a cut trace between pads. To disconnect, cut the trace with a sharp utility knife. To reconnect, install a 0 603
resistor or connect the two pads with solder. The optional connections are non-populated (no-pop) resistor
footprints. To connect, install a 0  603 resistor or connect the two pads with solder. The User Control ON
connections are only enabled when the User Control switch is moved to the ON position.
Table 6 shows a summary of the default and optional connections for each pin.
MCU Pin
P0.10
P0.12
P0.13
P0.14
P0.15
P0.11
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P0.8
P0.9
CAPSENSE
CAPSENSE
CAPSENSE
CAPSENSE
Default
XTAL1
RTC1
RTC2
MCU Card Function
VREFGND
Optional
VREF
Table 6. MCU Pin Functions
IDAC
User Control
Rev. 0.2
ON
USART_UCLK_A
ADC_VREFGND
SPI_NSS0_EZR
I2SOUT_DFS_A
SPI_MISO_EZR
SPI_MOSI_EZR
USART_RTS_A
USART_CTS_A
SPI_SCK_EZR
USART_TX_A
USART_RX_A
C2D_TX00_A
C2D_TX01_A
C2D_TX02_A
C2D_TX03_A
C2D_TX04_A
C2D_TX05_A
C2D_TX06_A
PCA_CH0_A
PCA_CH1_A
ADC_VREF
I2V_INP_A
I2V_INN_A
UDP Motherboard Signal
Default
GPIO12
GPIO13
IDAC_B
IDAC_A
GPIO11
UDP SiM3U1xx
I2SOUT_CLK_A
CP_OUT_A
Optional
GPIO14
GPIO15
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