RFM68W
RFM68W Low Cost ISM Transmitter
Features
GENERAL DESCRIPTION The RFM68W is an ultra-low-cost, FSK or OOK transmitter module suitable for operation in the 315, 433, 868 and 915 MHz licence free ISM bands., the RFM68W may be used without the requirement for configuration via an MCU. However, in conjunction with a microcontroller, the communication link parameters may be re-configured. Including, output power, modulation format and operating channel. The RFM68W offers integrated radio performance with cost efficiency and is suited for operation in North America FCC part 15.231, FCC part 15.247 DTS and FHSS modes,15.249, and Europe EN 300 220. In order to better use RFM68W modules, this specification also involves a large number of the parameters and functions of its core chip RF68's,including those IC pins which are not leaded out. All of these can help customers gain a better understanding of the performance of RFM68W modules, and enhance the application skills. APPLICATIONS Garage Door Openers Low-Cost Consumer Electronic Applications Remote Keyless Entry (RKE) Remote Control / Security Systems
Module
V1.2
RFM68W
KEY PRODUCT FEATURES +10 dBm or 0 dBm Configurable output power Bit rates up to 100 kbps OOK and FSK modulation. 1.8 to 3.7 V supply range. Low BOM Fully Integrated Tx Fractional-N PLL with 1.5 kHz typical step Frequency agility for FHSS modulation FCC Part 15.247 DTS Mode compliant Module Size:15X14.5mm
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1
Free Datasheet http://www.datasheet4u.com/
RFM68W
Table of contents
Section 1. Page
Circuit Description.................................................................................................................................................... 3 1.1. General Description ......................................................................................................................................... 3 1.2. Block Diagram.................................................................................................................................................. 3 1.3. Pin Description,............................................................................................................................................ 4 2. Electrical Characteristics ......................................................................................................................................... 5 2.1. ESD Notice ...................................................................................................................................................... 5 2.2. Absolute Maximum Ratings ............................................................................................................................. 5 2.3. Operating Range.............................................................................................................................................. 5 2.4. Electrical Specifications....................................................................................................................................... 6 3. 4. Timing Characteristics ............................................................................................................................................. 7 Application Modes of the RFM68W............................................................................................................................8 4.1. Transmitter Modes ........................................................................................................................................... 8 4.2. Mode Selection Flowchart................................................................................................................................ 9 4.3. Application Mode: Power & Go ....................................................................................................................... 10 4.4. Application Mode: Advanced ......................................................................................................................... 10 4.4.1. Advanced Mode: Configuration............................................................................................................... 10 4.4.2. Frequency Hopping Spread Spectrum.................................................................................................... 10 4.5. Frequency Band Coverage ............................................................................................................................ 11 4.6. Power Consumption.........................................................................................................................................11 5. RFM68W Configuration............................................................................................................................................12 5.1. TWI Access .....................................................................................