3

Pin and signal description

The two figures below give the pinouts of the two packages in which the devices are delivered. The table

describes the associated signals.

TSSOP28

7

PP

8

GND

9

NiC

10

NiC

11

NiC

12

13

14

NiC

MISO

NiC

VPS

MOSI

SPI_CLK

1

2

3

4

5

6

NiC

NiC

NiC

GPI

NiC

NiC

NiC

NiC

22

21

20

19

18

17

16

15

28

27

26

25

24

23

NiC

NiC

NiC

NiC

NiC

NiC

SPI_CS

SPI_PIRQ

SPI_RST

VQFN32

1

NiC

2

GND

3

NiC

4

NiC

5

NiC

6

GPI

7

PP

8

NiC

32 31 30 29 28 27 26 25

MISO

NiC

VPS

MOSI

SPI_CS

SPI_CLK

SPI_PIRQ

SPI_RST

24

23

22

21

20

19

18

17

9 10 11 12 13 14 15 16

33

NiC

Signal

Type

Description

VPS

Input

Power supply. This pin must be connected to 1.8 V or 3.3 V DC power rail supplied by the motherboard.

GND

Input

GND has to be connected to the main motherboard ground.

SPI_RST

Input

SPI Reset, active low, used to re-initialize the device. Must not be unconnected. External pull-up resistor

required if it cannot be driven.

MISO

Output SPI Master Input, Slave Output (output from slave)

MOSI

Input

SPI Master Output, Slave Input (output from master)

SPI_CLK

Input

SPI Serial Clock (output from master)

SPI_CS

Input

SPI Chip (or Slave) Select, internal pull-up (active low; output from master)

ST33TPHF2ESPI

Pin and signal description

DB2716 - Rev 4

page 5/26