MCS3122 datasheet(13/26 Pages) MICROCHIP

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DS40001762A-page 13

MCS3122

5.2

Baud Rate

The baud rate of an encoder’s transmission is highly

configurable using the two bits in the Transmitter

Setting Byte 1 register (0x35).

5.3

Transmission Modulation Format

The RF transmission can be configured to modulate

using Frequency-Shift Keying (FSK) or On-Off Keying

(OOK). The selection is done using one bit in the

Transmitter Settings Byte 0 register (0x34).

5.4

Frequency and Band Selection

The RF frequency configuration is performed by

selecting the appropriate bits in the Transmitter

Settings Byte 0 register (0x34).

5.5

Deviation Selection

When using FSK modulation, the frequency deviation

can be configured using bits <7:6> in the Transmitter

Settings Byte 0 register (0x34).

5.6

Power Output

The RF output power can be configured to either 0 dBm

or 10 dBm. The setting is done using bit <5> in the

Transmitter Settings Byte 0 register (0x34).

TABLE 5-1:

BAUD RATE SELECTION

OPTIONS

TE (µS)

Bits <5:4>

200

1:1

150

1:4

100

1:4

1:16

TABLE 5-2:

MODULATION FORMAT

SELECTION OPTIONS

Modulation

Bit <3>

FSK

OOK

TABLE 5-3:

FREQUENCY SELECTION

OPTIONS

Frequency

Bits <2:0>

315.00 MHz(1)

000

390.00 MHz

001

418.00 MHz

010

433.92 MHz

011

868.30 MHz

100

868.65 MHz

101

868.90 MHz

110

915.00 MHz

111

Note 1:

For 315.00 MHz operation, a 24 MHz

crystal is required. All the other frequency

settings will require a 26 MHz crystal.

TABLE 5-4:

FREQUENCY DEVIATION

SELECTION OPTIONS

Deviation

Bits <7:6>

200 kHz

100 kHz

75 kHz

50 kHz

TABLE 5-5:

OUTPUT POWER SELECTION

OPTIONS

Out Power

Bit <5>

0 dBm

10 dBm

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