Silicon Laboratories C8051F970 User Manual page 9

CP210x USB-to-
UART VCP Bridge
External Oscillator
Components
AAA Battery
Holder
5.1. Push-Button Switches and LEDs (S1-2, DS8-13)
The C8051F970 target board has two push-button switches and six LEDs. The switches are normally open and pull
the pin voltage to ground when pressed. The LEDs connect to VDD through a current-limiting resistor and turn on
when the corresponding port pin is low.
Each pin has a zero ohm resistor that can be used to disconnect the switches and LEDs from the GPIO pins.
Figure 5. C8051F970 Target Board Features—Back
Table 1. Switch and LED Pin Descriptions
MCU Pin
P1.2 Red LED DS8 (LED12)
P1.3 Red LED DS9 (LED13)
P1.4 Red LED DS10 (LED14)
P1.6 Red LED DS11 (LED16)
P0.5 Red LED DS12 (LED05)
P1.5 Red LED DS13 (LED15)
P0.4 Switch S1 (BTN04)
P0.3 Switch S2 (BTN03)
C8051F970DK-UG
Function
Rev. 0.1
Optional Pin
Isolation Resistors
9