Si4022

 

 

 

PIN DEFINITION

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

SDI

SCK

nSEL

SDO

nIRQ

CLK

VREFO

VSS_D

FSK

VDD

VSS_B

RF02

RF01

VSS_A

nRES

XTL / REF

Pin

Name

Function

Type

Description

1

SDI

SDI

DI

Serial control / data input

2

SCK

SCK

DI

Serial interface clock input

3

nSEL

nSEL

DI

Chip (interface) select input (active low)

4

SDO

SDO

DO

Serial status data output

5

nIRQ

nIRQ

DO

Interrupt request output (active low)

6

CLK

CLK

DO

Clock output for the microcontroller

7

VREFO

VREFO

AO

Voltage reference output

8

VSS_D

VSS_D

S

Negative supply voltage (digital)

9

XTL / REF

XTL

AIO

Crystal connection (other terminal of crystal to VSS)

REF

DI

External reference input

10

nRES

nRES

DO

Reset output (active low)

11

VSS_A

VSS_A

S

Negative supply voltage (analog)

12

RFO1

RFO1

AO

RF differential signal output (open collector)

13

RFO2

RFO2

AO

RF differential signal output (open collector)

14

VSS_B

VSS_B

S

Negative supply voltage (bulk)

15

VDD

VDD

S

Positive supply voltage

16

FSK

FSK

DI

Data input for asynchronous modulation

1

 

16

2

 

15

3

 

14

4

IA4222

13

5

 

12

6

 

11

7

 

10

8

 

9