RFM219SW datasheet(14/35 Pages) HOPE

14 / 35 page

RFM219SW

www.hoperf.com

Rev 1.0 | Page 14/35

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Category

Parameters

Descriptions

Default

Mode

Falling Relative

This is the relative threshold to shut down the (G)FSK

demodulation. It is measured in terms of RSSI code. The

range is from 0 to 255.

255

Advanced

AFC

Turn on/off the Automatic Frequency Control function.

The options are: On or Off.

Advanced

Decode

Settings

Data Mode

The data acquisition mode, the options are: Direct, Buffer

or Packet.

Packet

Basic

Advanced

Packet Type

The device can support two packet types. The options

are: Fixed length or Variable length.

Fixed Length

Basic

Advanced

FIFO Threshold

This defines the FIFO threshold that once it is reached,

an interrupt is generated to notify the external MCU. The

range is from 1 to 32, in terms of the FIFO address.

Basic

Advanced

De-Whitening

Seed

This parameter is only available when DC-Free Data

Decode is not set to “None”. The initial seed for the data

de-whitening polynomial. The range is from 0 to 255.

Basic

Advanced

DC-Free Decode

The options of DC-free data decoding are None,

Manchester 1 (01=one, 10=zero), Manchester 2 (10=

one, 01=zero), or Data De-whitening.

None

Basic

Advanced

Preamble

The size of the valid preamble, the options are: None,

1-byte, 2-byte, 3-byte, or 4-byte.

2-byte

Basic

Advanced

Sync Size

The size of the Sync Word, the options are: None, 1-byte,

2-byte, 3-byte, or 4-byte. This option cannot be set to

“None” in buffer mode.

3-byte

Basic

Advanced

Sync Value

This parameter is only available when Sync Size is not

set to “None”. It defines the value of the Sync Word, the

range is from 0 to 2

N-1, where N is determined by Sync

Size. For example, if Sync Size is 1-byte, N is 8; if Sync

Size is 2-byte, N is 16, etc.

Basic

Advanced

Sync Tolerance

The number of bits tolerated for the Sync Word

recognition. The options are: None, 1 Error, 2 Errors or 3

Errors.

None

Basic

Advanced

Node ID Options

The options for the Node ID detection are: None, Detect

Node ID, Detect Node ID and 0x00, or Detect Node ID,

0x00 and 0xFF

None

Basic

Advanced

Node ID Value

This parameter is only available when the Node ID

Options is not set to “None”. It defines the value of the

Node ID. The range is from 0 to 255.

Basic

Advanced

Data Length

This defines the number of bytes of data in a fixed length

packet. The range is from 0 to 32.

Basic

Advanced

CRC Options

The options for the CRC are: None, CCITT or IBM.

None

Basic

Advanced

CRC Seed

This parameter is only available when CRC Options is not

set to “None”. It defines the initial seed for the CRC

polynomial. The range is from 0 to 65535.

Basic

Advanced

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