U P M P - F 9 6 0 - E M I F
10
Rev. 0.1
4.8. Potentiometer (R50)
The potentiometer is available on P1.4. To facilitate a low-power potentiometer, P2.7 connects to bottom of the
potentiometer as a potentiometer enable (POT_EN). Drive P2.7 low to enable the potentiometer. Alternatively,
install a 0
resistor for R51 to continuously enable the potentiometer.
4.9. Pulse Counter Terminals (J14)
The MCU card includes a 4-position screw terminal connection. These field-wiring terminals will accept large wire
for a commercial water or gas meter. The PC0 and PC1 signals connect to P1.0 and P1.1 on the target MCU.
These are dedicated pins for the C8051F960/Si1020 low-power pulse counter. The VIO and ground connections
are also available for Form C meters. Refer to the C8051F960 data sheet for additional information about the pulse
counter.
4.10. Port Pin Headers (J9-J12)
All of the MCU port pins are available on the 0.100 inch headers on either side of the UPPI Pico Board.
Pins P1.2 and P1.3 are normally used for the RTC and are not connected by default to the P1.2 and P1.3 headers.
To use P1.2 and P1.3 for other purposes, remove the RTC crystal on the UPPI Pico Board and populate the two
small adjacent resistors with 0
resistors.
When using the Si1020 UPPI Pico Board, the SPI1 pins are connected internally and do not connect to the header
pins.
electronic components distributor
