1.2.2 2-Lead µVSFN Socket Interface

The basic circuitry needed to use a device in a 2-lead µVSFN socket includes:

  • Socket U1 has pogo pins to connect the 2-lead µVSFN to the socket and the board.
  • Jumper J3 connects the SIO signal to either RX/TX (SWI mode) or SIO_2 (SWI-PWM mode) header pins on header J2. R2 and R5 are pull-up resistors connected to the respective signal lines for each mode of operation. These resistors are required for correct operation. By default, the Jumper cap JP1 is connected to signal SIO_2.
Tip: For correct configuration based on part number, see Table 4-1.
Figure 1-4. 3-Lead Contact Socket