Silicon Laboratories C8051F960, User Manual

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C 8 0 5 1 F 9 6 x / S i 1 0 2 x
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5.11. C8051F96x Board Default and Optional Connections
The C8051F96x MCU card has many default and optional connections for use with different radios and the UDP
motherboard. The default connections have shorting jumpers consisting of a 603 resistor footprint with a trace
between the pads. To disconnect a default connection, cut the trace between the pads. 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.
When using the Si1020 UPPI Pico Board, some of the MCU port pins connect to EZRadioPRO port pins by default.
Note that plugging the UPPI Pico Board into the MCU card will connect some pins together.
Table 1 shows a summary of the default and optional connections for each pin.
Table 1. MCU Pin Functions
MCU Pin
MCU Card Function UDP Motherboard Signal
Default Optional Default Optional
P0.0 SPI_LCD_SCK EBID_SCK
P0.1 SPI_LCD_MISO EBID_MISO
P0.2 SPI_LCD_MOSI EBID_MOSI
P0.3 VREF SPI_LCD_NSS
P0.4/TX TX
P0.5/RX RX
P0.6 CTS EZR_I2C_SDA
P0.7 RTS EZR_I2C_SCL GPIO2
P1.0 PC0
P1.1 PC1
P1.2 XTAL3
P1.3 XTAL4
P1.4 POT EZR_ARSSI
P1.5 GPIO_1 EZRP_RX_DOUT/
EZRP_GPI0_1
EZR_FFIT
P1.6 EZRP_NIRQ
P1.7 EZRP_SDN
P2.0/SCK1 EZRP_SCK
P2.1/MISO1 EZRP_MISO
P2.2/MOSI1 EZRP_MOSI
P2.3/NSS1 EZRP_NSS
P2.4 PIEZO
P2.5 GPIO_0 EZRP_TX_DATA_IN/
EZRP_GPIO_0
P2.6 SPI_LCD_A0
P2.7 POT_EN
P3.0 SW1/LED1
P3.1 SW2/LED2