Si4322

4

PIN DEFINITIONS

Pin type key: D=digital, A=analog, S=supply, I=input, O=output, IO=input/output

Pin

Name

Function

Type

Description

1

SDI

SDI

DI

Data input of serial control interface

2

SCK

SCK

DI

Clock input of serial control interface

3

nSEL

nSEL

DI

Chip select input of serial control interface (active low)

SDO

DO

Serial data out for Status Read Command.

Tristate with bushold cell if nSEL= H

4

SDO / FFIT

FFIT

DO

FIFO IT (active low)

5

nIRQ

nIRQ

DO

Interrupt request output (active low)

DATA

DO

Received data output (FIFO not used)

6

DATA / nFFS

nFFS

DI

FIFO select input

DCLK

DO

Received data clock output (digital filter used, FIFO not used)

FFIT

DO

FIFO IT (active high) FIFO empty function can be achieved when FIFO

IT level is set to1

7

DCLK

CFIL

AIO

External data filter capacitor connection (analog filter used)

8

CLK

CLK

DO

Clock output for the microcontroller

XTL

AIO

Crystal connection (other terminal of crystal to VSS)

9

XTL / REF

REF

DI

External reference input

10

nRES

nRES

DO

Reset output (active low)

11

VSS

VSS

S

Negative supply voltage

12

IN2

IN2

AI

RF differential signal input

13

IN1

IN1

AI

RF differential signal input

14

VDD

VDD

S

Positive supply voltage

15

ARSSI

ARSSI

AO

Analog RSSI output

16

VDI

VDI

DO

Valid Data Indicator output

1

2

4

5

3

6

7

8

16

15

13

12

14

11

10

9

SDI

SCK

nSEL

SDO / FFIT

nIRQ

DATA / nFFE

DCLK / nFFS / CFIL

CLK

VDI

ARSSI

VDD

IN1

IN2

VSS

nRES

XTL / REF

IA4322

1234567890123

1234567890123

1234567890123

1234567890123

1234567890123

1234567890123

1234567890123

1234567890123