Si4356

Rev 1.2

11

3. Device Configuration

The Si4356 is configured for operation using the four configuration selector pins (SEL0 – SEL3). These pins will be

connected to one of four possible inputs: GND, VDD, RX DATA/OUT1 (pin 14), or OUT0 (pin 12). Refer to the

tables below for how these pins should be connected for the desired configuration.

SEL0 and SEL1 may be connected to VDD, GND, or OUT1 to choose desired frequency. Note that a 10 k



resistor should be inserted between SEL1 and OUT1 when SEL1 is mapped to OUT1. See Table 9 for frequency

settings.

SEL2 and SEL3 may be connected to VDD, GND, or OUT1 to choose desired modem configuration. See Table 10

for basic configurations. Note that a 10 k

SEL2 and/or SEL3 are mapped to GND.

Table 9. Frequency Selection

SEL0

SEL1

Frequency (MHz)

GND

VDD

433.92

VDD

VDD

315.00

OUT1

VDD

434.15

GND

OUT1

867.84

VDD

OUT1

868.30

OUT1

OUT1

917.00

Table 10. Basic Configuration

Config.

Name

SEL2

SEL3

Mod

Data Rate

(kbps)

RxBW (kHz)

Squelch

Recommended

OOK1

GND

GND

OOK

0.5–5

206

Disabled

—

OOK2

VDD

GND

OOK

1–10

370

Disabled

—

OOK3

OUT1

GND

OOK

10–50

370

Disabled

—

OOK4

OUT0

GND

OOK

50–120

370

Disabled

—

OOK5

GND

VDD

OOK

50–120

535

Disabled

—

OOK6

VDD

VDD

OOK

0.5–2.4

100

Disabled

—

FSK1

GND

OUT1

(G)FSK

0.5–30

155

Disabled

30

FSK2

VDD

OUT1

(G)FSK

0.5–30

185

Disabled

70

FSK3

OUT1

OUT1

(G)FSK

0.5–30

275

Disabled

30

FSK4

OUT0

OUT1

(G)FSK

10–120

275

Disabled

70

FSK5

GND

OUT0

(G)FSK

10–120

535

Disabled

70

FSK6

VDD

OUT0

(G)FSK

0.5–2.4

155

Enabled

30

FSK7

OUT1

OUT0

(G)FSK

0.5–2.4

275

Enabled

30