Silicon Laboratories UDP C8051F370, User Manual

Page: 13 / 38

C 8 0 5 1 F 3 9 x / F 3 7 x
Rev. 0.2 13
5.9.1. P0.2 and P0.3
By default, pins P0.2 and P0.3 connect to the EXT_INT0 and EXT_INT1 signals respectively on the UDP
motherboard. To disconnect these signals, remove the solder on the R13 and R14 footprint resistors.
5.9.2. P1.1
By default, pin P1.1 connects to the CLKOUT0/SYSCLK signal on the UDP motherboard. To disconnect this signal,
remove the solder on the R15 foot resistor.
5.9.3. P1.7 and 2.0
By default, pins P1.7 and P2.0 connect to the SMBUS0_SDA and SMBUS0_SCL signals respectively on the UDP
motherboard. To disconnect these signals, remove the solder on the R24 and R26 footprint resistors.
By default, pins P1.7 and P2.0 also connect to the T0 and T1 signals respectively on the UDP motherboard. To
disconnect these signals, remove the solder on the R25 and R27 footprint resistors.
By default, P2.0 also connects to the ADC_IN0 signal on the UDP motherboard. To disconnect this signal, remove
the solder on the R28 foot resistor.
5.9.4. P2.1 and R2.2
By default, pins P2.1 and P2.2 connect to the CP_OUT_A and CP_OUT_A_A signals respectively on the UDP
motherboard. To disconnect these signals, remove the solder on the R29 and R31 footprint resistors.
By default, pins P2.1 and P2.2 also connect to the ADC_IN3 and ADC_IN2 signals respectively on the UDP
motherboard. To disconnect these signals, remove the solder on the R30 and R32 footprint resistors.
5.9.5. P2.3 and R2.4
By default, pins P2.2 and P2.4 do not connect to the SMBUS_SDA_EZR and SMBUS_SCL_EZR signals
respectively on the UDP motherboard. To connect these signals, solder the R33 and R35 footprint resistors.
By default, pin P1.0 connects to the ADC_IN1 signal on the UDP motherboard. To disconnect this signal, remove
the solder on the R34 foot resistor.