4.2

Power supply filtering

As mentioned in Section 3 Pin and signal description, the power supply of the circuit must be filtered using the

circuit shown in the figure below.

TPM

Host device

SPI_MOSI

SPI_RST

VPS

GND

100 nF

10 µF

+

-

SPI_MISO

SPI_CLK

SPI_CS

SPI_PIRQ

1.

10 µF and 100 nF are recommended values. The minimum required capacitor value is 2.1 µF (2 µF in

parallel with 100 nF).

ST33TPHF2ESPI

Power supply filtering

DB2716 - Rev 4

page 8/26