RFM68W RFM68W Low Cost ISM Transmitter Module V1.2 Features GENERAL DESCRIPTION APPLICATIONS The RFM68W is an ultra-low-cost, Garage Door Openers FSK or OOK transmitter module Low-Cost Consumer suitable for operation in the 315, 433, 868 and 915 MHz licence Electronic Applications free ISM bands., the RFM68W Remote Keyless Entry (RKE) may be used without the requirement for configuration via Remote Control / Security an MCU. However, in conjunction Systems with a microcontroller, the RFM68W communication link parameters may be re-configured. Including, output power, modulation format KEY PRODUCT FEATURES and operating channel. +10 dBm or 0 dBm The RFM68W offers integrated radio performance with cost Configurable output power efficiency and is suited for operation in North America FCC Bit rates up to 100 kbps part 15.231, FCC part 15.247 OOK and FSK modulation. DTS and FHSS modes,15.249, 1.8 to 3.7 V supply range. and Europe EN 300 220. Low BOM Fully Integrated Tx In order to better use RFM68W Fractional-N PLL with 1.5 kHz modules, this specification also typical step involves a large number of the Frequency agility for FHSS parameters and functions of its core chip RF68 s,including those modulation IC pins which are not leaded out. FCC Part 15.247 DTS Mode All of these can help customers gain a better understanding of compliant the performance of RFM68W Module Size:15X14.5mm modules, and enhance the application skills. 1 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales hoperf.com RFM68W Table of contents Section Page 1. 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. Timing Characteristics ............................................................................................................................................. 7 4. 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 ......................................................................................................................................................12 5.2. APPLICATION Configuration Parameters ..................................................................................................... 14 5.3. FREQUENCY Configuration Parameters ...................................................................................................... 14 5.4. Test Parameters (internal) ............................................................................................................................. 15 5.5. Status Parameters ......................................................................................................................................... 15 5.6. Recovery Command ....................................................................................................................................... 16 6. Application Information .......................................................................................................................................... 17 6.1. Reference Design .......................................................................................................................................... 17 6.2. NRESET Pin ................................................................................................................................................... 18 6.3. TX READY Pin ............................................................................................................................................... 18 6.4. Low Power Optimization ................................................................................................................................. 18 6.4.1. 2 Connections: CTRL, DATA ................................................................................................................... 18 6.4.2. 3 Connections: CTRL, DATA, TX READY .............................................................................................. 18 7. RFM68W Packaging .................................................................................................................................................19 7.1. S2 Package Outline Drawing ...........................................................................................................................19 8. Ordering Information.20 2 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales hoperf.com